Removing a mask requires special attention to avoid hand contamination, and it could also breed a false sense of security.

in some parts of Asia everyone now wears a mask by default - it is seen as safer and more considerate.

In mainland China, Hong Kong, Japan, Thailand and Taiwan, the broad assumption is that anyone could be a carrier of the virus, even healthy people. So in the spirit of solidarity, you need to protect others from yourself.

In East Asia, many people are used to wearing masks when they are sick or when it's hayfever season, because it's considered impolite to be sneezing or coughing openly.

The 2003 Sars virus outbreak, which affected several countries in the region, also drove home the importance of wearing masks, particularly in Hong Kong, where many died as a result of the virus.So one key difference between these societies and Western ones, is that they have experienced contagion before - and the memories are still fresh and painful.

Some argue that ubiquitous mask wearing, as a very visual reminder of the dangers of the virus, could actually act as a "behavioural nudge" to you and others for overall better personal hygiene.

But there are downsides of course. Some places such as Japan, Indonesia and Thailand are facing shortages at the moment, and South Korea has had to ration out masks.

There is the fear that people may end up re-using masks - which is unhygienic - use masks sold on the black market, or wear homemade masks, which could be of inferior quality and essentially useless.

People who do not wear masks in these places have also been stigmatised, to the point that they are shunned and blocked from shops and buildings.

In countries where mask wearing is not the norm, such as the West, those who do wear masks have been shunned or even attacked. It hasn't helped that many of these mask wearers are Asians.

Much of the old nomenclature has turned out to be not only stigmatizing but inaccurate. The Ebola virus, for instance, gets its name from a river that sits about forty miles from Yambuku, the Congolese village where researchers first investigated the disease, in 1976.

Still, it’s hard not to see a similarity between the recent reports of harassment against Asian-Americans and the stigmatization that gay people suffered in the wake of the AIDS outbreak.

What investors think the public is thinking is therefore crucial.

Predicting the emotional reactions of the entire world population to coronavirus would be a bit easier if investors could turn to the market effects of previous pandemics for guidance. But history provides few indications of what might happen to the economy if the coronavirus and COVID-19, the disease it causes, continue to spread.

There's also the startle response — when you jump out of your skin — which is a way to get yourself away from something when you haven't got the time to even work out what it is, but it's coming at you very suddenly and very loudly.

First up, there's the classic jump scare, explains Andy Nyman, co-creator of the long-running London horror stage play Ghost Stories, which was also turned into a 2017 film starring Martin Freeman. "Often people think that's a bit of a cheap thing to do but the reality is that it's actually quite a sophisticated thing to pull off."If you can get it right, misdirecting an audience properly and then giving them a jump scare is a really wonderful thing because you're properly catching them off guard."

Then, Andy goes on, there's the type of scare that you can't shake off. "These are the scares that are attached to imagery or a moment that means when you close your eyes that's all you can see. These are much deeper-rooted."

If you're a very jumpy person who gets scared easily (or if you have a specific phobia, a severe form of fear that impacts on your life), there are things you can do on your own and with a therapist to help you improve

"The first thing is to realise that it's best to take things at your own pace and that may mean you don't need to face that fear right now but you're going to do it when you're ready."Most things that frighten people can be broken down into smaller, more manageable sections

And Dr Kerr has some practical tips, too, including exposure therapy, cognitive behavioural therapy and breathing exercises.

In the late 1900s, researchers discovered that mitochondria were free-living bacteria at some point in the past. Somehow they were drawn inside another cell, providing new fuel for their host. In 2015, Thijs Ettema of Uppsala University in Sweden and his colleagues discovered fragments of DNA in sediments retrieved from the Arctic Ocean. The fragments contained genes from a species of archaea that seemed to be closely related to eukaryotes.Dr. Ettema and his colleagues named them Asgard archaea. (Asgard is the home of the Norse gods.) DNA from these mystery microbes turned up in a river in North Carolina, hot springs in New Zealand and other places around the world.

Masaru K. Nobu, a microbiologist at the National Institute of Advanced Industrial Science and Technology in Tsukuba, Japan, and his colleagues managed to grow these organisms in a lab. The effort took more than a decade.The microbes, which are adapted to life in the cold seafloor, have a slow-motion existence. Prometheoarchaeum can take as long as 25 days to divide. By contrast, E. coli divides once every 20 minutes.

In the lab, the researchers mimicked the conditions in the seafloor by putting the sediment in a chamber without any oxygen. They pumped in methane and extracted deadly waste gases that might kill the resident microbes.The mud contained many kinds of microbes. But by 2015, the researchers had isolated an intriguing new species of archaea. And when Dr. Ettema and colleagues announced the discovery of Asgard archaea DNA, the Japanese researchers were shocked. Their new, living microbe belonged to that group.The researchers then undertook more painstaking research to understand the new species and link it to the evolution of eukaryotes.The researchers named the microbe Prometheoarchaeum syntrophicum, in honor of Prometheus, the Greek god who gave humans fire — after fashioning them from clay.

This finding suggests that the proteins that eukaryotes used to build complex cells started out doing other things, and only later were assigned new jobs.Dr. Nobu and his colleagues are now trying to figure out what those original jobs were. It’s possible, he said, that Prometheoarchaeum creates its tentacles with genes later used by eukaryotes to build cellular skeletons.

Before the discovery of Prometheoarchaeum, some researchers suspected that the ancestors of eukaryotes lived as predators, swallowing up smaller microbes. They might have engulfed the first mitochondria this way.

Instead of hunting prey, Prometheoarchaeum seems to make its living by slurping up fragments of proteins floating by. Its partners feed on its waste. They, in turn, provide Prometheoarchaeum with vitamins and other essential compounds.

Those speech abilities could include distinct vowels and consonants, syllables, or even syntax—all of which, according to LDT, should be impossible for any animal without a human vocal tract.

As John Locke, a linguistics professor at Lehman College, put it, “Motor control rots when you die.” Soft tissues like tongues and nerves and brains generally don’t fossilize; DNA sequencing is impossible past a few hundred thousand years; no one has yet found a diary or rap track recorded by a teenage Australopithecus.

One of the quantitative models the new study relies on, he says, doesn’t properly represent the shape of the larynx, tongue, and other parts we use to talk: “It would convert a mailing tube into a human vocal tract.” And according to Lieberman, laryngeal descent theory “never claimed language was not possible” prior to the critical changes in our ancestors’ throat anatomy. “They’re trying to set up a straw man,” he said.

Rather than 27 million years, Hickok proposes that the earliest bound on any sort of speech ability would be nearer to human ancestors’ split with the Pan genus, which includes chimpanzees and bonobos, our closest living relatives. That split happened about 5 million to 7 million years ago—certainly longer than 200,000 years, but a far cry from 27 million. Lieberman argues that the precursors of speech might have emerged about a little more than 3 million years ago, when artifacts like jewelry appear in the archaeological record. The idea is that both language and jewelry are intimately related to the evolution of symbolic thinking.

“This is a hidden impact of climate change … that could actually impact our ability to solve the problem itself,” he said.

The science is, at first glance, surprisingly fundamental. Researchers have long believed that carbon dioxide harms the brain at very high concentrations. Anyone who’s seen the film Apollo 13 (or knows the real-life story behind it) may remember a moment when the mission’s three astronauts watch a gauge monitoring their cabin start to report dangerous levels of a gas. That gauge was measuring carbon dioxide. As one of the film’s NASA engineers remarks, if CO₂ levels rise too high, “you get impaired judgement, blackouts, the beginning of brain asphyxia.”

The same general principle, he argues, could soon affect people here on Earth. Two centuries of rampant fossil-fuel use have already spiked the amount of CO₂ in the atmosphere from about 280 parts per million before the Industrial Revolution to about 410 parts per million today. For Earth as a whole, that pollution traps heat in the atmosphere and causes climate change. But more locally, it also sets a baseline for indoor levels of carbon dioxide: You cannot ventilate a room’s carbon-dioxide levels below the global average.

In fact, many rooms have a much higher CO₂ level than the atmosphere, since ventilation systems don’t work perfectly.

On top of that, some rooms—in places such as offices, hospitals, and schools—are filled with many breathing people, that is, many people who are themselves exhaling carbon dioxide.

As the amount of atmospheric CO₂ keeps rising, indoor CO₂ will climb as well.

in one 2016 study Danish scientists cranked up indoor carbon-dioxide levels to 3,000 parts per million—more than seven times outdoor levels today—and found that their 25 subjects suffered no cognitive impairment or health issues. Only when scientists infused that same air with other trace chemicals and organic compounds emitted by the human body did the subjects begin to struggle, reporting “headache, fatigue, sleepiness, and difficulty in thinking clearly.” The subjects also took longer to solve basic math problems. The same lab, in another study, found that indoor concentrations of pure CO₂ could get to 5,000 parts per million and still cause little difficulty, at least for college students.

But other research is not as optimistic. When scientists at NASA’s Johnson Space Center tested the effects of CO₂ on about two dozen “astronaut-like subjects,” they found that their advanced decision-making skills declined with CO₂ at 1,200 parts per million. But cognitive skills did not seem to worsen as CO₂ climbed past that mark, and the intensity of the effect seemed to vary from person to person.

There’s evidence that carbon-dioxide levels may impair only the most complex and challenging human cognitive tasks. And we still don’t know why.

No one has looked at the effects of indoor CO₂ on children, the elderly, or people with health problems. Likewise, studies have so far exposed people to very high carbon levels for only a few hours, leaving open the question of what days-long exposure could do.

Modern humans, as a species, are only about 300,000 years old, and the ambient CO₂ that we encountered for most of our evolutionary life—from the first breath of infants to the last rattle of a dying elder—was much lower than the ambient CO₂ today. I asked Gall: Has anyone looked to see if human cognition improves under lower carbon-dioxide levels? If you tested someone in a room that had only 250 parts per million of carbon dioxide—a level much closer to that of Earth’s atmosphere three centuries or three millennia ago—would their performance on tests improve? In other words, is it possible that human cognitive ability has already declined?

The capsule, named CST-100 Starliner, is part of a NASA program called Commercial Crew, an effort to launch astronauts to the ISS from the U.S. The agency has not had that capability since the space-shuttle program ended in 2011 under the weight of cost, safety, and political factors.

According to NASA officials, after Starliner separated from the rocket, the capsule missed the moment it needed to ignite its engines for a carefully timed and fully automated process known as an orbital insertion burn. Without that step, the spacecraft couldn’t fire the thrusters to shove itself into the correct orbit.

But the craft was flying just out of reach of communication, between two satellites. When engineers could finally contact Starliner, they made the spacecraft thrust itself higher, but it was too late. The confused capsule had been burning fuel to maintain its position, and didn’t have enough left to execute that crucial push toward the ISS.

Jim Chilton, the senior vice president of Boeing Space and Launch, said engineers don’t know why the clock went off track. Nicole Mann, who would have made her first trip to space on the next mission, said that the astronauts “train extensively for this type of contingency, and had we been on board, there could have been actions that we could have taken,” such as manually controlling the spacecraft.

Now the future of the program is uncertain, particularly for Boeing. It’s unclear what additional tests NASA might now require from Boeing before letting astronauts fly, including, perhaps, another attempt at an uncrewed mission. The capsule’s failure will certainly reshuffle schedules and could contribute to further delays for Boeing, already under scrutiny for its sluggishness in a recent report from NASA’s inspector general.

The spacecraft failure means yet another cycle of bad news for Boeing. The company has a long history with NASA; it was the prime contractor for the ISS and also worked on the space shuttles. But the company is better known for its airplanes, and in recent months the flaws of its 737 Max, which contributed to two deadly crashes, have put Boeing under intense pressure to prove that its aircraft are safe.

In the coming days, NASA and Boeing teams will review data from Starliner’s short-lived mission. And the space agency will continue its negotiations to buy more seats on the Soyuz, Russia’s transportation system, which can cost as much as $86 million. NASA’s last trip on the Soyuz system is scheduled for April. If neither company’s crew capsule is ready by then, NASA will have to buy more slots to ensure that American astronauts can launch to space.

Although three million miles sounds vast, it’s not much on the scale of our solar system. In fact, despite the planet’s elliptical path through the heavens, most astronomers say that Earth’s orbit is basically circular. On a scale of 0 to 100 percent, where 0 is a perfect circle and nearly 100 is a very thin oval, Earth only scores a 1.7.

It’s a defining trait that keeps our planet at roughly the same distance from our sun, and keeps the climate relatively stable. This has led many astronomers to wonder whether a circular orbit just might be a crucial ingredient in the cocktail of life — and a key factor to consider as they search for signs of alien life around the thousands of exoplanets known to be circling other stars within the galaxy.

Such a dire portrait could suggest that life prefers a circle. But do most exoplanets orbit their host stars in bands similar to the Earth, or are their orbits more like that of HD 20782 b?

Consider the exoplanet known as HD 20782 b, which boasts the highest eccentricity yet discovered — a whopping 97 percent. Although the alien world is likely more akin to Jupiter than Earth in mass, it’s easy to imagine what might happen to a wildly eccentric Earthlike planet.At its closest approach to the star, the planet would face an explosion of heat that would evaporate the planet’s oceans and strip the planet’s atmosphere, sending crucial molecules such as oxygen streaming into space.

This suggests that most of these rocky worlds might be able to host a stable climate and, therefore, life.But Dr. Kane and other researchers warned against dismissing the possibility of life forming on worlds with highly-eccentric orbits.

Last year, Dr. Kane and his colleagues estimated that a planet with an eccentricity as high as 30 or even 40 percent could remain habitable

the galaxy and its many orbiting planets could surprise us. “I think it’s often assumed that life is wimpy and needs ‘just so’ conditions to exist,” Dr. Raymond said. “But life on Earth did indeed survive some tough times.”

The new process may also help in other procedures where doctors need to analyze tissue while they are still operating, such as head and neck, breast, skin and gynecologic surgery, the report said. It also noted that there is a shortage of neuropathologists, and suggested that the new technology might help fill the gap in medical centers that lack the specialty. Video Advertisement LIVE 00:00 1:05

Algorithms are also being developed to help detect lung cancers on CT scans, diagnose eye disease in people with diabetes and find cancer on microscope slides.

The diagnoses were later judged right or wrong based on whether they agreed with the findings of lengthier and more extensive tests performed after the surgery.The result was a draw: humans, 93.9 percent correct; A.I., 94.6 percent.

At some centers, he said, brain surgeons do not even order frozen sections because they do not trust them and prefer to wait for tissue processing after the surgery, which may take weeks to complete.

Some types of brain tumor are so rare that there is not enough data on them to train an A.I. system, so the system in the study was designed to essentially toss out samples it could not identify.

“It won’t change brain surgery,” he said, “but it’s going to add a significant new tool, more significant than they’ve stated.”

Fox Island Environmental Education Center, a Virginia institution that has opened up the wonders of the natural world to young people for more than 40 years, shut down in November. Between erosion and sea level rise, so much of the island’s salt marsh had disappeared that “it made it unsafe to run the program,” said Tom Ackerman, vice president for education at the Chesapeake Bay Foundation, which owns the island center.

because south Louisiana’s land is subsiding while the oceans are rising, the region has what may be the highest relative sea level rise in the country. “We’re just 10 to 30 years in front of the curve of everybody else,” he said.

Officials predict that, without action, the lab might need to shut down several dozen days each year within the next 10 to 15 years. The corrosive saltwater attacks the structure and has risen up through the soil into buried electrical cables, at one point causing a blackout. Some floods are accompanied by droves of fiddler crabs that sometimes find their way into the elevators.

Many marine labs are preparing to meet similar challenges, though they are in locations that are not yet facing the level of threat that Louisiana is.

At the Louisiana center, Ms. Conover sees educational value in their problems. Along with its mission as a scientific research facility, it is also a center for environmental education with visits from some 5,000 students each year. “If our parking lot is flooding when a group is here, we definitely talk about why we’re flooding on that given day, when five years ago we wouldn’t, given the same conditions.” That example, she said, “gives the perspective of what our coastal communities are dealing with.”

“Global sea-level rise is one of the greatest challenges facing society in the 21st century, and understanding how this phenomenon impacts coastal systems, infrastructure and the people who use them requires a regular coastal presence.”