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Skeptical Debunker

Does promiscuity prevent extinction? - 0 views

  • Known as 'polyandry' among scientists, the phenomenon of females having multiple mates is shared across most animal species, from insects to mammals. This study suggests that polyandry reduces the risk of populations becoming extinct because of all-female broods being born. This can sometimes occur as a result of a sex-ratio distortion (SR) chromosome, which results in all of the Y chromosome 'male' sperm being killed before fertilisation. The all-female offspring will carry the SR chromosome, which will be passed on to their sons in turn resulting in more all-female broods. Eventually there will be no males and the population will die out. For this study, the scientists worked with the fruitfly Drosophila pseudoobscura. They gave some populations the opportunity to mate naturally, meaning that the females had multiple partners. The others were restricted to having one mate each. They bred several generations of these populations, so they could see how each fared over time. Over fifteen generations, five of the twelve populations that had been monogamous became extinct as a result of males dying out. The SR chromosome was far less prevalent in the populations in which females had the opportunity to have multiple mates and none of these populations became extinct. The study shows how having multiple mates can suppress the spread of the SR chromosome, making all-female broods a rarity. This is because males that carry the SR chromosome produce only half as many sperm as normal males. When a female mates with multiple males, their sperm will compete to fertilise her eggs. The few sperm produced by males carrying the SR chromosome are out-competed by the sperm from normal males, and the SR chromosome cannot spread.
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    Promiscuous females may be the key to a species' survival, according to new research by the Universities of Exeter and Liverpool. Published today (25 February) in Current Biology, the study could solve the mystery of why females of most species have multiple mates, despite this being more risky for the individual.
Skeptical Debunker

Exotic Antimatter Created on Earth - Yahoo! News - 0 views

  • Among the many particles that resulted from this crash were bizarre objects called anti-hypertritons. Not only are these things antimatter, but they're also what's called strange matter. Where normal atomic nuclei are made of protons and neutrons (which are made of "up" quarks and "down" quarks), strange nuclei also have so-called Lambda particles that contain another flavor of quark called "strange" as well. These Lambda particles orbit around the protons and neutrons. If all that is a little much to straighten out, just think of anti-hypertritons as several kinds of weird. Though they normally don't exist on Earth, these particles may be hiding in the universe in very hot, dense places like the centers of some stars, and most likely were around when the universe was extremely young and energetic, and all the matter was packed into a very small, sweltering space. "This is the first time they've ever been created in a laboratory or a situation where they can be studied," said researcher Carl Gagliardi of Texas A&M University. "We don't have anti-nuclei sitting around on a shelf that we can use to put anti-strangeness into. Only a few anti-nuclei have been observed so far." These particles weren't around for too long, though – in fact, they didn't last long enough to collide with normal matter and annihilate. Instead they just decayed after a fraction of a billionth of a second. "That sounds like a really short time, but in fact on the nuclear clock it's actually a long time," Gagliardi told SPACE.com. "In that fraction of a billionth of a second that Lambda particle has already gone around the nucleus as many times as the Earth has gone around the sun since the solar system was created."
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    Scientists have created a never-before seen type of exotic matter that is thought to have been present at the earliest stages of the universe, right after the Big Bang. The new matter is a particularly weird form of antimatter, which is like a mirror-image of regular matter. Every normal particle is thought to have an antimatter partner, and if the two come into contact, they annihilate. The recent feat of matter-tinkering was accomplished by smashing charged gold atoms at each other at super-high speeds in a particle accelerator called the Relativistic Heavy Ion Collider at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory in Upton, N.Y.
thinkahol *

Mind gym: Putting meditation to the test - life - 11 January 2011 - New Scientist - 0 views

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    Mystics will tell you that meditation transforms the mind and soothes the soul. But what does science have to say?
thinkahol *

Binge eaters' dopamine levels spike at sight, smell of food - 1 views

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    ScienceDaily (Feb. 28, 2011) - A brain imaging study at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory reveals a subtle difference between ordinary obese subjects and those who compulsively overeat, or binge: In binge eaters but not ordinary obese subjects, the mere sight or smell of favorite foods triggers a spike in dopamine -- a brain chemical linked to reward and motivation.
thinkahol *

Does sexual equality change porn? - Pornography - Salon.com - 0 views

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    In what may feel like a flashback to the porn wars of the '60s, a new study investigates the link between a country's relative gender equality and the degree of female "empowerment" in the X-rated entertainment it consumes. Researchers at the University of Hawaii focused on three countries in particular: Norway, the United States and Japan, which are respectively ranked 1st, 15th and (yikes) 54th on the United Nations' Gender Empowerment Measure (GEM). To simplify their analysis, their library of smut was limited to explicit photographs of women "from mainstream pornographic magazines and Internet websites, as well as from the portfolios of the most popular porn stars from each nation." Then they set out to evaluate each image on both a disempowerment and an empowerment scale, using respective measures like whether the woman is "bound and dominated" by "leashes, collars, gags, or handcuffs" or "whether she has a natural looking body." Their hypothesis was that societies with greater gender equity will consume pornography that has more representations of "empowered women" and less of "disempowered women." It turned out the former was true, but, contradictory as it may sound, the latter was not. "While Norwegian pornography offers a wider variety of body types -- conforming less to a societal ideal that is disempowering to the average woman -- there are still many images that do not promote a healthy respect for women," the researchers explain. In other words, Norwegian porn showed more signs of female empowerment, but X-rated images in all three countries equally depicted women in demeaning positions and scenarios. This, the researchers surmise, "suggests that empowerment and disempowerment within pornography are potentially different constructs." So, gender equality is accompanied by sexual interest in a broader range of beauty types but not a decrease in porn's infantilization of females, use of dominating fetish gear on women or any of the other characteristics th
thinkahol *

Does that hurt? Objective way to measure pain being developed - 0 views

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    ScienceDaily (Sep. 14, 2011) - Researchers from the Stanford University School of Medicine have taken a first step toward developing a diagnostic tool that could eliminate a major hurdle in pain medicine -- the dependency on self-reporting to measure the presence or absence of pain. The new tool would use patterns of brain activity to give an objective physiologic assessment of whether someone is in pain.
Charles Daney

Will Power: You Grow With The Task -- Ingenious Monkey - 20 two 5 - 0 views

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    Following Baumeister et al.'s widely cited work on self-regulation, many psychologists view will-power as a depletable resource. According to this view, whenever we perform acts of self-regulation (e.g. resisting a delicious piece of cake) we tap into our individual will-power reservoir (think of it as a bank account), and thereby reduce the amount of will-power left for subsequent tasks. According to a study published in the Journal of Applied Psychology, however, this plausible intuition does not necessarily seem to hold true entirely.
thinkahol *

TEDxRheinMain - Prof. Dr. Thomas Metzinger - The Ego Tunnel - YouTube - 1 views

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    Brain, bodily awareness, and the emergence of a conscious self: these entities and their relations are explored by Germanphilosopher and cognitive scientist Metzinger. Extensively working with neuroscientists he has come to the conclusion that, in fact, there is no such thing as a "self" -- that a "self" is simply the content of a model created by our brain - part of a virtual reality we create for ourselves. But if the self is not "real," he asks, why and how did it evolve? How does the brain construct the self? In a series of fascinating virtual reality experiments, Metzinger and his colleagues have attempted to create so-called "out-of-body experiences" in the lab, in order to explore these questions. As a philosopher, he offers a discussion of many of the latest results in robotics, neuroscience, dream and meditation research, and argues that the brain is much more powerful than we have ever imagined. He shows us, for example, that we now have the first machines that have developed an inner image of their own body -- and actually use this model to create intelligent behavior. In addition, studies exploring the connections between phantom limbs and the brain have shown us that even people born without arms or legs sometimes experience a sensation that they do in fact have limbs that are not there. Experiments like the "rubber-hand illusion" demonstrate how we can experience a fake hand as part of our self and even feel a sensation of touch on the phantom hand form the basis and testing ground for the idea that what we have called the "self" in the past is just the content of a transparent self-model in our brains. Now, as new ways of manipulating the conscious mind-brain appear on the scene, it will soon become possible to alter our subjective reality in an unprecedented manner. The cultural consequences of this, Metzinger claims, may be immense: we will need a new approach to ethics, and we will be forced to think about ourselves in a fundamentally new way. At
anonymous

Genetic Modification Of Plants: A Natural Method! - 1 views

New qualities acquainted with harvest plants by genetic engineering can possibly build good yields, enhance horticultural practices, or add nourishing quality to items. Case in point, genetically m...

modified plants genetically crops microbial genetics science research Trivedi Effect the

started by anonymous on 02 Jan 15 no follow-up yet
jafar67

What is the difference between vapor and gas? ~ Wiki Mini For Chem - 0 views

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    Difference between vapor and gas The term gas refers to a substance that is in its gaseous form or a substance that has a single defined thermodynamic state at room temperature whereas a vapor refers to a substance that is a equilibrium between two phases at room temperature, namely gaseous and liquid phase. All matter on earth exists in any of the three states: solid, liquid or gaseous. 'Gas' refers to a substance in the gaseous state. Gases do not have either shape or volume. However, the term 'vapor' or 'vapour' refers to a substance in equilibrium between two phases, usually liquid and gaseous. Vapor is not a state of matter but is a specific type of gas. Gases are in a gaseous state at room temperature. The molecules in a gas can expand to occupy any available volume as there is very little inter molecular attraction. On the other hand, the molecules of a vapor gain energy and vaporize from a substance which is either a solid or liquid at room temperature. For example, steam is a water vapor that turns into water at room temperature. Oxygen, which is a gas, will still be a gas at room temperature. Gas is a state of matter. Vapor is not, it is constantly in transition. An easy way to distinguish between vapor and gas is that vapor is something that can be seen or smelled or something that settles down on the ground, while one cannot see a gas but can only smell it. However, there are some exceptions to this classification, for example, water vapor. Water vapor cannot be smelt and it does not settle down on the ground.
anonymous

Learn More About Dairy Farming - 1 views

There is so much about dairy farming that is not known by the common public. With the majority of people going back to organic farming and natural products, this kind of dairy products has a lot of...

organic farming dairy Mahendra The Effect science research trivedi

started by anonymous on 22 Dec 14 no follow-up yet
Janos Haits

Videoneat Watch Free Documentaries and Lectures Online ad free - 0 views

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    "NOTE: all the materials presented on videoneat.com are public, this web site does not host or own any of the video related content."
Erich Feldmeier

Andrew Newberg: What God does to your brain - Telegraph - 0 views

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    "When neuroscientist Andrew Newberg scanned the brain of "Kevin", a staunch atheist, while he was meditating, he made a fascinating discovery. "Compared with the Buddhist monks and Franciscan nuns, whose brains I'd also scanned, Kevin's brain operated in a significantly different way," he says"
anonymous

How To Grow Ginseng Organically? - 0 views

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    Ginseng does not cultivate in full daylight, so the regular habitation to plant it is in hardwood jungles, where the trees offer the desirable shadow. Mahendra trivedi at trivedi foundation constantly involved in determining better techniques for ginseng agriculture and receiving best out of it.
kingwinny

enzymes used in leather industry - 0 views

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    Lipase enzymes used in leather industry has achieved good results in degreasing of crepe, fur, leather, gelatin, and the like. Candida lipolytica lipase can reduce the oil content of the raw material of the spinning material from 10% to 0.5%, to meet the spinning requirements, and does not affect the fiber strength.
ratnakarshukla

Here are the 5 apps that every entrepreneur should use - 0 views

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    Are you a self-starter, energetic, creative and determined individual? Simply, in one word are you an entrepreneur? An entrepreneur does not only chase his/her dreams, ideas and convert them into something tangible but also has to keep himself/herself motivated, maintain a work-life balance, manage a gazillion of things and a lot more. So, here are 5 apps which may help you strike 'that' balance.
jimsandres

Playing Pokemon - 0 views

Playing Pokemon Go as a Tourist Pokemon Go has been one of the most viral games of 2016. It's an augmented reality game which utilizes the gps, data connection, and a lot of cell phone battery to p...

started by jimsandres on 16 May 17 no follow-up yet
angelinascofield

How Does Hypnosis Work on The Brain - 0 views

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    We all know information stored in subconscious mind is permanent and if we can find out how to bypass the conscious state we can do a lot of good things like we can get rid of smoking and other health benefits. Find out how we can alter the conscious state of mind and put information directly to subconscious mind. Science revealed how hypnosis affects the brain.
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    We all know information stored in subconscious mind is permanent and if we can find out how to bypass the conscious state we can do a lot of good things like we can get rid of smoking and other health benefits. Find out how we can alter the conscious state of mind and put information directly to subconscious mind. Science revealed how hypnosis affects the brain.
Janos Haits

Math Does Not Equal Calculating: Using Computer-Based Math Education - 0 views

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    "computerbasedmath.org is the project to perform this reset. We're building a completely new math curriculum with computer-based computation at its heart, while campaigning at all levels to redefine math education away from historical hand-calculating techniques and toward real-life problem-solving situations that drive high-concept math understanding and experience."
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