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pier-paolo

Where'd I Stash That Chocolate? It's Easy to Remember - The New York Times - 0 views

  • It is easier to remember where the chocolate is than where the cucumbers are, new research suggests.
  • They moved from table to table on which eight foods were placed: caramel cookies, apples, chocolate, tomatoes, melons, peanuts, potato chips and cucumbers.
  • hey were instructed to either smell or taste the foods and to rate them on likability and familiarity.
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  • the real purpose of the experiment: to determine how well they could remember where the foods were located in the room.
  • Of the 512 people in the experiment, half did the test by tasting, half by smelling the food. After leaving the room, they smelled or tasted the foods again in random order and were asked to locate them on a map of the room they had just traversed.
  • they were 27 percent more likely to correctly place the high-calorie foods than the low-calorie foods they tasted, and 28 percent more likely to correctly locate the high-calorie foods they smelled.
  • “Our results seem to suggest that human minds are adapted to finding energy rich food in an efficient way,”
  • “This may have implications for how we navigate our modern food environment.”
pier-paolo

The Importance of Intuition, Time-And Speaking Last - The New York Times - 0 views

  • What makes the difference between a good and a great leader? A. Time. I do believe there are people in the world that have a natural ability at leadership, but I also believe you can teach, coach and build great leaders,
  • you need to get things finished and done, follow through on your commitments to your employees, leaders, consumers. Clarity and consistency of communication are also important. I often think that although great leaders can overcommunicate they keep it simple
  • I think it’s much more useful to me and to the team if I speak last. So I work very hard to create an environment to encourage everybody else to speak up before I weigh in.
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  • It’s a long list. For me, if you’re not making mistakes, you’re not growing. It’s O.K. to try and not achieve, it’s not O.K. not to try
  • As your company has grown through acquisitions, you’ve had to integrate a lot of different teams. How do you tackle this integration of different cultures? A. Time. You can fundamentally approach acquisitions two ways. The company that acquires says, “This is the way we do it around here, so you will change and adopt our processes. Bang!”
huffem4

Accommodating Children's Anxiety Can Do More Harm Than Good | Psychology Today - 1 views

  • Parents face great challenges raising kids in our increasingly complex, frightening and uncertain world. The CDC reports that anxiety is on the rise among children, affecting 7.1 percent of children 6 to 17 years of age, about 4.4 million U.S. kids. The majority are untreated.
  • Children face myriad challenges—bullying, developmental trauma, information overload, global political upheavals and conflict, climate change, high rates of family breakup, and so on.
  • Learning to ride out anxiety and negotiate firm-but-flexible boundaries is a language much harder to learn in adulthood.
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  • Parental consistency can help protect children from emotional problems. Children can and do become caught in the middle between parents who aren’t getting along. Such "triangulation" distracts children from addressing their own needs. Compassion buffers empathy, allowing parents to tolerate their children's distress without getting overwhelmed, numbing out, or becoming enraged. Parents are encouraged to engage their curiosity when they feel the urge to accommodate or try to overpower children.
  • Perception was important for mothers. Mothers who reported that their children showed more severe symptoms were more likely to use accommodation, but maternal accommodation was unrelated to the mothers' own reported distress and emotional state. It may be that mothers wish to spare their children anticipated distress, and that this desire is different from overall distress. Including measures of empathy and parental distress due specifically to child's distress could tease this apart in future studies.
  • Accommodation increases anxiety because youngsters never have a chance to fail and persist. This can stunt self-efficacy, preventing “fear extinction” and “habituation” to anxiety-provoking situations. It's a vicious cycle, increasing the chance of giving up too easily with future challenges, though innate resilience, related to child temperament, can mitigate the effects of problematic environmental factors.
  • Higher child distress and emotional dysregulation, as measured by parents, was associated with increased parental accommodation. Parental accommodation was not correlated with child-reported distress and emotional dysregulation.
  • maternal accommodation was correlated with child anxiety and externalizing behaviors (in which emotions are directed outward, typically in aggressive or destructive ways, rather than processed in healthy ways or bottled up)
  • Accommodation fixes problems short-term—for instance when a parent "gives in" to a child's tantrums to get them to stop screaming, or bribes a child to do something rather than building intrinsic motivation with a longer-term process of rewarding effort and building an inner sense of confidence
pier-paolo

The Election Is Almost Over. That Doesn't Mean Democrats Are Relaxed. - The New York Times - 0 views

  • “I’m assuming in my mind that Trump wins, because I can’t deal with being let down like that again,”
  • “Secretly, in a little corner in the back of my mind, I’m wishing and hoping that Biden wins. But most of my brain is saying, ‘OK, Trump wins and New York is not getting a fiscal bailout and we’re going to lose more ground on the environment, we’re going to lose on Roe v. Wade, we’re going to lose on health care.’”
  • It’s hard to overstate the degree of anxiety in America right now, as the country confronts a Hydra of troubles: the pandemic, the economy, the fires, the protests, the violent plots against public officials, the assault on voting rights, the state-sponsored disinformation, the sense that democracy itself is on the ballot.
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  • 68 percent of American adults said that the 2020 election was a “significant source of stress” in their lives. (Among Democrats, the figure was 76 percent; it was 67 percent for Republicans and 64 percent for Independents.) Across the board, 77 percent of Americans said they were stressed about the future of the country.
  • It’s very bumpy and you’re riding along the highway and you have pothole after pothole. The news cycle is probably under 30 minutes right now.”
  • “What we’re seeing among Democrats is the sense that ‘we were in this position four years ago, so we’re not getting our hopes up,’” said Patrick Murray, director of the Monmouth University Polling Institute. “Republicans are consistently more confident that the election is going to go the way they want.”
  • “Polls give people a false sense of security, and they think they don’t have to turn out to vote,” he said. “Is there going to be a peaceful transfer of power? That’s a big question. The big worry is that he won’t accept the results, or he’s going to incite violence.”
ilanaprincilus06

Manipulating memory to treat addiction | Mo Costandi | Neurophilosophy blog | Science |... - 0 views

  • the procedure involves manipulating addicts' memories of past drug use, and could lead to non-pharmacological therapy for addiction, as well as psychiatric conditions such as post-traumatic stress disorder and phobia.
  • the procedure involves manipulating addicts' memories of past drug use, and could lead to non-pharmacological therapy for addiction, as well as psychiatric conditions such as post-traumatic stress disorder and phobia.
    • ilanaprincilus06
       
      Could this manipulation affect other parts of the brain?
  • addicts quickly associate paraphernalia and other drug-associated cues with the pleasurable effects of the drug, so that seeing these cues triggers cravings and drug-seeking behaviour.
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  • Current treatments effectively relieve cravings in the clinic, but not when addicts return to their usual environment
  • This process – called 'extinction' – forms the basis of cue exposure therapy, in which addicts are repeatedly exposed to drug-associated cues and prevented from responding to them in the usual way of using the drug.
  • It combines cue exposure with manipulation of a process called memory reconsolidation, in which information is retrieved from long-term storage and then reactivated so that it can be strengthened.
  • "We did the extinction training during reconsolidation, and what seems to have happened is that we somehow updated the old fear memory,"
  • also manipulates reconsolidation of addicts' memories of past drug use to weaken their habitual responses to paraphernalia and other drug-related stimuli.
  • so it remains to be seem whether the procedure will be effective in preventing cravings outside of the clinical setting.
lucieperloff

Fantastic beasts in the real world and where to find them - BBC News - 0 views

  • Muggles are being invited to see a parade of fantastic beasts at the Natural History Museum (NHM).
  • Muggles are being invited to see a parade of fantastic beasts at the Natural History Museum (NHM).
    • lucieperloff
       
      Bringing people together through Harry Potter!
  • It's a tie-up with the BBC and Warner Brothers, who brought author JK Rowlings' Harry Potter books - and their Fantastic Beasts spinoffs - to the big screen.
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  • Interactive and immersive displays will essentially compare and contrast the different animals - the real from the imagined.
  • This is an opening to talk about the different ways many animals in the real world use camouflage. It's not magic, but it's still amazing.
    • lucieperloff
       
      Creating interest for more people
  • Just as Newt Scamander wants to highlight the fragility of the beasts that exist in the magiworld, the NHM is on a mission also to highlight the vulnerabilities of the many animals threatened with extinction in the here and now.
lucieperloff

Dogs are humans' oldest companions, DNA shows - BBC News - 0 views

  • The analysis reveals that dog domestication can be traced back 11,000 years, to the end of the last Ice Age.This confirms that dogs were domesticated before any other known species.
  • The analysis reveals that dog domestication can be traced back 11,000 years, to the end of the last Ice Age.This confirms that dogs were domesticated before any other known species.
    • lucieperloff
       
      Dogs have been important for a VERY long time
  • To some extent, dog genetic patterns mirror human ones, because people took their animal companions with them when they moved.
    • lucieperloff
       
      We have things in common with dogs - relates to migrations
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  • "Dogs are our oldest and closest animal partner. Using DNA from ancient dogs is showing us just how far back our shared history goes and will ultimately help us understand when and where this deep relationship began."
  • If there were multiple domestication events around the world, these other lineages did not contribute much DNA to later dogs.
    • lucieperloff
       
      Basically came from one type of event
lucieperloff

Secrets of the 'uncrushable' beetle revealed - BBC News - 0 views

  • Equipped with super-tough body armour, the insect can survive being stamped on or even run over by a car.
  • Equipped with super-tough body armour, the insect can survive being stamped on or even run over by a car.
    • lucieperloff
       
      Oh no... Where does this thing live?
  • And the findings could give clues to building tougher materials for use in construction and aeronautics.
    • lucieperloff
       
      Can actually have a positive impact on society
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  • which allow the beetle to withstand forces of up to 149 Newtons (approximately 39,000 times the creature's body weight).
  • To test the potential of this type of structure as a way of joining different materials, such as plastics and metal, the scientists made a series of joints from metal and composites based on those seen in the beetle.
    • lucieperloff
       
      Able to improve science and technology from something found in nature
anonymous

Hearing ghost voices relies on pseudoscience and fallibility of human perception - 0 views

  • Hearing ghost voices relies on pseudoscience and fallibility of human perception
  • Nontrivial numbers of Americans believe in the paranormal.
  • Part of the attraction of the audio recorder for paranormal researchers is its apparent objectivity. How could a skeptic refute the authenticity of a spirit captured by an unbiased technical instrument? To the believers, EVP seem like incontrovertible evidence of communications from beyond.
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  • But recent research in my lab suggested that people don’t agree much about what, if anything, they hear in the EVP sounds – a result readily explained by the fallibility of human perception.
  • In some instances, alleged EVP are the voices of the investigators or interference from radio transmissions – problems that indicate shoddy data collection practices. Other research, however, has suggested that EVP have been captured under acoustically controlled circumstances in recording studios.
  • Research in mainstream psychology has shown that people will readily perceive words in strings of nonsensical speech sounds.
  • People’s expectations about what they’re supposed to hear can result in the illusory perception of tones, nature sounds, machine sounds, and even voices when only acoustic white noise – like the sound of a detuned radio – exists.
  • Interpretations of speech in noise – a situation similar to EVP where the alleged voice is difficult to discern – can shift entirely based upon what the listener expects to hear.
  • In my lab, we recently conducted an experiment to examine how expectations might influence the perception of purported EVP
  • So suggesting a paranormal research topic mattered only when the audio was ambiguous.
  • when people said they heard a voice in the EVP, only 13% agreed about exactly what the voice said. To compare, 95% percent of people on average agreed about what the voice said when they heard actual speech.
  • These findings suggest that paranormal researchers should not use their own subjective judgments to confirm the contents of EVP.
  • But perhaps most importantly, we showed that the mere suggestion of a paranormal research context made people more likely to hear voices in ambiguous stimuli, although they couldn’t agree on what the voices were saying.
  • pareidolia – the tendency to perceive human characteristics in meaningless perceptual patterns
  • There are many visual examples of pareidolia – things like seeing human faces in everyday objects (such as Jesus in a piece of toast).
  • Research from cognitive psychology has shown that paranormal believers may be especially prone to misperceiving chance events.
  • Another characteristic of pseudoscience is a lack of integration with related areas of inquiry. There is a rich history of using experimental methods to examine auditory perception, yet EVP enthusiasts are either unaware or willfully ignorant of this relevant work.
  • parsimony – the idea that the simplest explanation is preferred
  • we need a theory to account for how and why a human listener sometimes misperceives ambiguous stimuli.
  • In fact, this very tendency is one of many well-documented cognitive shortcuts that may have adaptive value. A voice may indicate the presence of a potential mate or foe, so it may be useful to err on the side of perceiving agency in ambiguous auditory stimuli.
  • Currently, there is only limited, tentative evidence to link exposure to pseudoscience on television to pseudoscientific beliefs. Still, one study showed that people find paranormal research to be more credible and scientific when it is shown using technological tools such as recording devices. Other evidence has suggested that popular opinion may outweigh scientific credibility when people evaluate pseudoscientific claims.
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    Why do we hear voices or weird noises and think of spooky stories or ghosts? It all has to do with perception of the audible information we're taking in and how we've been influenced about this topic.
anonymous

Human Brain: facts and information - 0 views

  • The human brain is more complex than any other known structure in the universe.
  • Weighing in at three pounds, on average, this spongy mass of fat and protein is made up of two overarching types of cells—called glia and neurons—and it contains many billions of each.
  • The cerebrum is the largest part of the brain, accounting for 85 percent of the organ's weight. The distinctive, deeply wrinkled outer surface is the cerebral cortex. It's the cerebrum that makes the human brain—and therefore humans—so formidable. Animals such as elephants, dolphins, and whales actually have larger brains, but humans have the most developed cerebrum. It's packed to capacity inside our skulls, with deep folds that cleverly maximize the total surface area of the cortex.
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  • The cerebrum has two halves, or hemispheres, that are further divided into four regions, or lobes. The frontal lobes, located behind the forehead, are involved with speech, thought, learning, emotion, and movement.
  • Behind them are the parietal lobes, which process sensory information such as touch, temperature, and pain.
  • At the rear of the brain are the occipital lobes, dealing with vision
  • Lastly, there are the temporal lobes, near the temples, which are involved with hearing and memory.
  • The second-largest part of the brain is the cerebellum, which sits beneath the back of the cerebrum.
  • diencephalon, located in the core of the brain. A complex of structures roughly the size of an apricot, its two major sections are the thalamus and hypothalamus
  • The brain is extremely sensitive and delicate, and so it requires maximum protection, which is provided by the hard bone of the skull and three tough membranes called meninges.
  • Want more proof that the brain is extraordinary? Look no further than the blood-brain barrier.
  • This led scientists to learn that the brain has an ingenious, protective layer. Called the blood-brain barrier, it’s made up of special, tightly bound cells that together function as a kind of semi-permeable gate throughout most of the organ. It keeps the brain environment safe and stable by preventing some toxins, pathogens, and other harmful substances from entering the brain through the bloodstream, while simultaneously allowing oxygen and vital nutrients to pass through.
  • One in five Americans suffers from some form of neurological damage, a wide-ranging list that includes stroke, epilepsy, and cerebral palsy, as well as dementia.
  • Alzheimer’s disease, which is characterized in part by a gradual progression of short-term memory loss, disorientation, and mood swings, is the most common cause of dementia. It is the sixth leading cause of death in the United States
  • 50 million people suffer from Alzheimer’s or some form of dementia. While there are a handful of drugs available to mitigate Alzheimer’s symptoms, there is no cure.
  • Unfortunately, negative attitudes toward people who suffer from mental illness are widespread. The stigma attached to mental illness can create feelings of shame, embarrassment, and rejection, causing many people to suffer in silence.
  • In the United States, where anxiety disorders are the most common forms of mental illness, only about 40 percent of sufferers receive treatment. Anxiety disorders often stem from abnormalities in the brain’s hippocampus and prefrontal cortex.
  • Attention-deficit/hyperactivity disorder, or ADHD, is a mental health condition that also affects adults but is far more often diagnosed in children.
  • ADHD is characterized by hyperactivity and an inability to stay focused.
  • Depression is another common mental health condition. It is the leading cause of disability worldwide and is often accompanied by anxiety. Depression can be marked by an array of symptoms, including persistent sadness, irritability, and changes in appetite.
  • The good news is that in general, anxiety and depression are highly treatable through various medications—which help the brain use certain chemicals more efficiently—and through forms of therapy
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    Here is some anatomy of the brain and descriptions of diseases like Alzheimer's and conditions like ADHD, depression, anxiety.
katedriscoll

What is hypnosis and how might it work? - 0 views

  • Hypnosis can be seen as ‘a waking state of awareness, (or consciousness), in which a person’s attention is detached from his or her immediate environment and is absorbed by inner experiences such as feelings, cognition and imagery’.1 Hypnotic induction involves focusing of attention and imaginative involvement to the point where what is being imagined feels real. By the use and acceptance of suggestions, the clinician and patient construct a hypnotic reality.
  • Everyday ‘trance’ states are part of our common human experience, such as getting lost in a good book, driving down a familiar stretch of road with no conscious recollection, when in prayer or meditation, or when undertaking a monotonous or a creative activity. Our conscious awareness of our surroundings versus an inner awareness is on a continuum, so that, when in these states, one’s focus is predominantly internal, but one does not necessarily lose all outer awareness.
  • Hypnosis could be seen as a meditative state, which one can learn to access consciously and deliberately, for a therapeutic purpose. Suggestions are then given either verbally or using imagery, directed at the desired outcome. This might be to allay anxiety by accessing calmness and relaxation, help manage side effects of medications, or help ease pain or other symptoms. Depending on the suggestions given, hypnosis is usually a relaxing experience, which can be very useful with a patient who is tense or anxious. However, the main usefulness of the hypnotic state is the increased effectiveness of suggestion and access to mind/body links or unconscious processing. Hypnosis can not only be used to reduce emotional distress but also may have a direct effect on the patient’s experience of pain.2
  •  
    This article dives deeper into what hypnosis is and how it works.
anonymous

The Best Educational Systems in the World - 0 views

  • In 2020, the top three educational systems in the world were Finland, Denmark, and South Korea
  • This is based on developmental levels including early childhood enrollment, test scores in math, reading, and science in primary and secondary levels, completion rates, high school and college graduation, and adult literacy rates.
  • Finland's education system is a dream: early education is designed around learning through play, school meals are free, and universities are tuition-free for students coming from EU, European Economic Area (EEA) countries, and Switzerland. A majority of teachers also have a master's degree; in fact, basic education teachers are required to have them.
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  • While education used to revolve around learning Latin, Greek, and philosophy (even today, literacy rates are high at approximately 99%), the education system today is well-rounded.
  • The government invests heavily in education, approximately 8% of its budget, and education is free for students until they turn 15 or 16 years old.
  • The public system is divided into six years of primary school, three years of secondary school, and then three years of either academic or vocational school.
  • allows students time each day to take a course of their choice that isn't included in their regular curriculum
  • . Students in South Korea take education seriously: many also are involved in supplemental tutoring and after-school programs called "hagwons."
  • The link between countries with outstanding educational systems and strong financial service sectors is becoming increasingly prominent, and the speed with which nations recovered from the effects of the global recession also showcased extraordinary robustnes
  • It is interesting to note that each nation is extremely federated, flexible, and far removed from the centralized model favored historically by developed nations.
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    This doesn't talk specifically about why these systems are better or help learning go much faster, but through their short descriptions of top global schools, I felt reminded of our discussion about classroom environment and raising hands etc.
runlai_jiang

Alien atmospheres recreated on Earth - BBC News - 0 views

  • Researchers have recreated the chemistry of atmospheres on distant planets for the first time in the lab, according to two new papers.
runlai_jiang

China 'gay conversion': Accounts of shocks and pills - BBC News - 0 views

  • Verbal abuse is the tip of the iceberg, according to the report.
  • They just told me they were supposed to be good for me and help with the progress of the 'treatment'," he explained.
  • How does family pressure lead to 'treatment'? All of those interviewed told Human Rights Watch that they were forcefully taken to "conversion" therapy. This often occurred within days of coming out to their parents, who felt "ashamed" that their children were gay.
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  • What do doctors say about diseases like Aids?Most of those forced to undergo therapy say they were subjected to verbal harassment and insults during treatment.
  • What's the situation of LGBT people in China?There is growing awareness of LGBT issues in China. Homosexuality was decriminalised in 1997 and removed from an official list of mental disorders in 2001. Big cities have lively gay scenes, and in June, Shanghai held a gay pride parade.However, advocacy groups say that millions of gay people in China have married heterosexual partners rather than come out as gay as a result of pressure from families. Last year a judge ruled that a gay couple could not register as married, the first case of its kind in China.
  • In July, a gay man in central China won an apology and compensation from a mental hospital over forced "conversion therapy".
  • Platonic love relationship: Find an "elegant and caring" member of the opposite sex. Establish a relationship as friends initially. Then hope it becomes something else.2. Repulsion therapy: Induce nausea with forced vomiting or fear of electrocution when thoughts of having a lover of the same sex emerge.3. Shock therapy: Cause major shock to your lifestyle by moving to an entirely new environment in order to sever connection with previous friends, etc.4. Sexual orientation transfer:
runlai_jiang

Elon Musk: Mars ship test flights 'next year' - BBC News - 0 views

  • Elon Musk, a man prone to ludicrous deadlines, has birthed another: test flights of his Mars spaceship next year."I think we’ll be able to do short flights, up and down flights, some time in the first half of next year," he told an audience at the South by South West (SXSW) festival in Austin, Texas.
  • Elon Musk is unquestionably the most interesting businessman in Silicon Valley - arguably the world - thanks to his almost single-handed reignition of the space race.After a string of failed rockets - and near bankruptcy - SpaceX wowed the world with its latest flight, Falcon Heavy, in February.
  • "This is a situation where you have a very serious danger to the public. There needs to be a public body that has insight and oversight so that everyone is delivering AI safely. This is extremely important.
knudsenlu

The neuroscience of inequality: does poverty show up in children's brains? | Inequality... - 0 views

  • The Neurocognition, Early Experience and Development Lab is home to cutting-edge research on how poverty affects young brains, and I’ve come here to learn how Noble and her colleagues could soon definitively prove that growing up poor can keep a child’s brain from developing.
  • handful of neuroscientists and pediatricians who’ve seen increasing evidence that poverty itself – and not factors like nutrition, language exposure, family stability, or prenatal issues, as previously thought – may diminish the growth of a child’s brain.
  • poor kids tended to perform worse academically than their better-off peers
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  • Prior to their study, scientists had never investigated the specific cognitive tasks (face learning, picture learning, vocabulary tests) in which poor children underperformed, let alone mapped out how their brain structure and development might differ.
  • The results, which Noble and Farah reported in a 2005 paper, were the beginning of what they call a “neurocognitive profile” of socioeconomic status and the developing brain. Farah, Noble and other scientists soon began using magnetic resonance imaging (MRI) scans to examine the brains of children across the socioeconomic spectrum.
  • The results were striking. In one study, Farah looked at 283 MRIs and found that kids from poorer, less-educated families tended to have thinner subregions of the prefrontal cortex – a part of the brain strongly associated with executive functioning – than better-off kids. That could explain weaker academic achievement and even lower IQs.
  • What’s more, the data indicated that small increases in family income had a much larger impact on the brains of the poorest children than similar increases among wealthier children. And Noble’s data also suggested that when a family falls below a certain basic level of income, brain growth drops off precipitously. Children from families making less than $25,000 suffered the most, with 6% less brain surface area than peers in families making $150,000 or more.
  • It’s really a shame for this field that Hillary Clinton’s not our president Martha Farah These studies indicate it isn’t one specific factor that’s solely responsible for diminishing brain growth and intellectual potential, but rather the larger environment of poverty.
runlai_jiang

Human Microbiome and Microbiota - 0 views

  • The human microbiota consists of the entire collection of microbes that live in and on the body. In fact, there are 10 times as many microbial inhabitants of the body than there are body cells. Study of the human microbiome is inclusive of inhabitant microbes as well as the entire genomes of the body's microbial communities. These microbes reside in distinct locations in the ecosystem of the human body and perform important functions that are necessary for healthy human development.
  • Microbes of the BodyMicroscopic organisms that inhabit the body include archaea, bacteria, fungi, protists, and viruses. Microbes start to colonize the body from the moment of birth. An individual's microbiome changes in number and type throughout his or her lifetime, with the numbers of species increasing from birth to adulthood and decreasing in old age. These microbes are unique from person to person and can be impacted by certain activities, such as hand washing or taking antibiotics. Bacteria are the most numerous microbes in the human microbiome.
  • Human skin is populated by a number of different microbes that reside on the surface of the skin, as well as within glands and hair. Our skin is in constant contact with our external environment and serves as the body's first line of defense against potential pathogens. Skin microbiota help to prevent pathogenic microbes from colonizing the skin by occupying skin surfaces. They also help to educate our immune system by alerting immune cells to the presence of pathogens and initiating an immune response
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  • The human gut microbiome is diverse and dominated by trillions of bacteria with as many as one-thousand different bacterial species. These microbes thrive in the harsh conditions of the gut and are heavily involved in maintaining healthy nutrition, normal metabolism, and proper immune function. They aid in the digestion of non-digestible carbohydrates, the metabolism of bile acid and drugs, and in the synthesis of amino acids and many vitamins. A number of gut microbes also produce antimicrobial substances that protect against pathogenic bacteria.
  • Microbiota of the oral cavity number in the millions and include archaea, bacteria, fungi, protists, and viruses. These organisms exist together and most in a mutualistic relationship with the host, where both the microbes and the host benefit from the relationship. While the majority of oral microbes are beneficial, preventing harmful microbes from colonizing the mouth, some have been known to become pathogenic in response to environmental changes. Bacteria are the most numerous of the oral microbes and include Streptococcus, Actinomyces, Lactobacterium, Staphylococcus, and Propionibacterium.
knudsenlu

Hawaii: Where Evolution Can Be Surprisingly Predictable - The Atlantic - 0 views

  • Situated around 2,400 miles from the nearest continent, the Hawaiian Islands are about as remote as it’s possible for islands to be. In the last 5 million years, they’ve been repeatedly colonized by far-traveling animals, which then diversified into dozens of new species. Honeycreeper birds, fruit flies, carnivorous caterpillars ... all of these creatures reached Hawaii, and evolved into wondrous arrays of unique forms.
  • The most spectacular of these spider dynasties, Gillespie says, are the stick spiders. They’re so-named because some of them have long, distended abdomens that make them look like twigs. “You only see them at night, walking around the understory very slowly,” Gillespie says. “They’re kind of like sloths.” Murderous sloths, though: Their sluggish movements allow them to sneak up on other spiders and kill them.
  • Gillespie has shown that the gold spiders on Oahu belong to a different species from those on Kauai or Molokai. In fact, they’re more closely related to their brown and white neighbors from Oahu. Time and again, these spiders have arrived on new islands and evolved into new species—but always in one of three basic ways. A gold spider arrives on Oahu, and diversified into gold, brown, and white species. Another gold spider hops across to Maui and again diversified into gold, brown, and white species. “They repeatedly evolve the same forms,” says Gillespie.
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  • Gillespie has seen this same pattern before, among Hawaii’s long-jawed goblin spiders. Each island has its own representatives of the four basic types: green, maroon, small brown, and large brown. At first, Gillespie assumed that all the green species were related to each other. But the spiders’ DNA revealed that the ones that live on the same islands are most closely related, regardless of their colors. They too have hopped from one island to another, radiating into the same four varieties wherever they land.
  • One of the most common misunderstandings about evolution is that it is a random process. Mutations are random, yes, but those mutations then rise and fall in ways that are anything but random. That’s why stick spiders, when they invade a new island, don’t diversify into red species, or zebra-striped ones. The environment of Hawaii sculpts their bodies in a limited number of ways.
  • Gillespie adds that there’s an urgency to this work. For millions of years, islands like Hawaii have acted as crucibles of evolution, allowing living things to replay evolution’s tape in the way that Gould envisaged. But in a much shorter time span, humans have threatened the results of those natural experiments. “The Hawaiian islands are in dire trouble from invasive species, and environmental modifications,” says Gillespie. “And you have all these unknown groups of spiders—entire lineages of really beautiful, charismatic animals, most of which are undescribed.”
sanderk

This Is Why You're Prone to Crying on Airplanes | Time - 1 views

  • For people who get anxious when there is a change in environment, just arriving at an airport can signal a perceived threat to the brain
  • And a mix of psychological factors related to the plane’s altitude and a perceived loss of control can cause a person to break down emotionally once in the air, DeLuca says.
  • “When you’re dehydrated, it’s not just the body that’s lacking in resources,” De Luca says. “Everything is affected”—including behavior and the brain. “Some people have difficulty self-regulating their emotions.”
  • ...1 more annotation...
  • A 2017 survey of passengers commissioned by London’s Gatwick Airport found that 15% of men and 6% of women are more likely to cry while watching a film on a flight than if they were to watch that movie elsewhere.
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    Whenever I fly I always see people getting freaked and I never knew why. For me, I really enjoy flying and it is fun for me. I found it very interesting that even arriving at an airport can be perceived as a threat to the brain. Also, I understand how people might get freaked out by not having control over the outcome of their flight. The article talks about how this lack of control can make people's brains go into overtime. This article helped explain to me how flying can mess with people's emotions which inturn disables their reasoning.
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