“Ape Who Went to College” Dies

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 Chantek, the beloved orangutan who was one of the first apes to learn sign language, has passed away at age 39.
 

 Chantek rose to fame after “attending university,” living with anthropologist Lyn Miles at the University of Tennessee for nine years. Miles and other caretakers taught him over 150 words in American Sign Language, as well as important human skills like cleaning his room, using the bathroom, and directing a car route.
 
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<img alt="" class="richtext-image full-width" src="https://www.pbs.org/wgbh/nova/media/images/chantek-1.width-990_2IV9LbC.jpg"/>
<figcaption>39-year-old Chantek was known for having an engaging personality.
 
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 His tenacity for learning made him the star of a 2014 PBS documentary “
 <a href="http://www.pbs.org/video/my-wild-affair-ape-who-went-college-1/">
 The Ape Who Went to College
 </a>
 .” In many ways, Chantek was raised much like a human. In fact, he sometimes referred to himself as an “orangutan person.”
 

 Chantek was among a special group of apes who knew ASL, including Koko, the gorilla, and Washoe, the chimpanzee.
 

 The BBC described the friendly ape:
 
<blockquote>

 Zoo Atlanta said that Chantek frequently used sign language to communicate with keepers but “he was shy about signing with individuals he did not know and often chose forms of communication which are more typical of orangutans, such as vocalisations and unique hand gestures”.
 

 “Chantek will be deeply missed by his family here at Zoo Atlanta,” said Hayley Murphy, vice president of the zoo’s animal divisions.
 

 “He had such a unique and engaging personality and special ways of relating to and communicating with those who knew him best. It has been our privilege to have had him with us for 20 years.”
 
</blockquote>

 Orangutans typically live about 35-45 years in the wild. Chantek was born at the Yerkes National Primate Research Center in Georgia. He returned to the Atlanta Zoo to live out his later years with other orangutans, including his friends 34-year-old female Madu and playful 10-year-old male Dumadi. While the cause of death has not been announced, he was being treated for heart disease, a leading cause of death among captive orangutans.
 

 Miles shared an example of his communication abilities
 <a href="http://www.bbc.com/news/av/uk-politics-40860444/he-asked-me-to-get-the-car-and-take-him-home">
 with the BBC
 </a>
 : “The last time I saw him not too long ago he asked me for meat cheese bread [a cheeseburger] and for me to get the car and take him home.”
 
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 Watch the incredible story of Chantek, the orangutan raised as a human child on an American university campus during the '70s and '80s.
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 Photo credit:
 <a href="https://twitter.com/ZooATL/status/894681378834571266">
 Zoo Atlanta / Twitter
 </a>

Fake News is Spreading Thanks to Information Overload

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 In the beginning, the internet was supposed to be the great equalizer, making knowledge accessible to everyone and giving all citizens a voice.


 Today, knowledge is more accessible, and more people have a voice, but it’s also increasingly hard to tell what’s real and what’s not.


 Blame social media. On networks like Facebook and Twitter, high- and low-quality information—read: accurate and inaccurate—have an equal chance of success, according to
 <a href="http://nature.com/articles/doi:10.1038/s41562-017-0132">
 a paper published today
 </a>
 by Diego F. M. Oliveira, Filippo Menczer, and a team of researchers.


 On social networks, they said, accuracy does not necessarily determine popularity. “Quality is not a necessary condition for virality,” Menczer said.


 Our ability to discriminate accurate information can be impeded by things like confirmation bias—where we are more likely to accept information if it matches our own beliefs—and popularity bias—where we view something as high quality because it is shared frequently.


 “Even when individual users can recognize and select quality information, the social media market rarely allows the best information to win the popularity contest,” Oliveira said.


 It’s a contest which is growing bigger by the day. According to a
 <a href="http://www.journalism.org/2016/05/26/news-use-across-social-media-platforms-2016/">
 2016 Pew Research Center report
 </a>
 , 62% of adults in the U.S. get news from social media sites, and 18% do so often. Nearly half the country uses Facebook as a news source in one form or another. People who use Facebook for news amount to 44% of the general population.

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 Despite the popularity of social media as a news source, not all popular content on these sites is high-quality, factual information. To see how low-quality information spread on these sites, Oliveira and Menczer’s paper,
 <a href="https://www.nature.com/articles/s41562-017-0132">
 published in Nature Human Behavior
 </a>
 , simulated a large social media system. The authors assumed that users were able to discern good quality information—an ideal scenario for social media usage, though perhaps a bit optimistic. They gave each post a quality rating that stood for factors such as accuracy, trustworthiness, reliability, and relevance. By varying how many pieces of information were produced in the system and how many posts a user could look at before sharing, the team examined conditions under which quality information went viral.


 When they modeled the hypothetical scenario—in which all users can tell good information from bad—the networks struck a balance between quality and diversity of information. In other words, many people’s voices were heard and the overall accuracy of posts on the site remained high.


 But when they introduced real-world data and conditions into the model, the volume of posts skyrocketed. The diversity of voices increased, but the quality of popular posts declined. The team discovered that eventually there is “so much information out there that we just can’t keep up,” Menczer said. “It underlines the limits of social media as a platform for news.”

<h2>
 Challenges of Diversity
</h2>

 “The implication is that the sheer diversity of information can actually have a downside,” John Wihbey, a professor of journalism and new media who studies virality and information literacy at Northeastern University, said of the study’s findings.


 “One of the critiques of the era of mainstream media is that we artificially gate-keep, not letting enough diverse voices into the conversation,” he said. “While the critique of high-quality news producers may still be valid, it’s a more complicated picture than maybe we’ve understood. When you have actors with bad intentions who want to do propaganda, misinformation, or just silly stuff…flooding environments with all kinds of clickbait, it doesn’t improve the ecosystem.”


 In the past year, fake news has become a global phenomenon. Only 24% of respondents in the
 <a href="http://www.digitalnewsreport.org/survey/2017/overview-key-findings-2017/">
 Reuters Institute Digital News Report
 </a>
 for 2017 that think social media is successful at separating fact from fiction, compared with 40% of respondents who think the same of the news media. The problem appears to be particularly acute in the U.S. Out of 36 countries, the U.S. emerged as the second most polarized. People reported trusting their favored news sources more than the news media in general by a 15% margin.


 But that hasn’t spelled the end of the news media. Online news subscriptions have risen from 9% to 16% this year, and news donations have tripled, according to the recent Reuters report. People under 35 contributed significantly to this increase, as the percentage of 18–24 year olds paying for news increased from 4% in 2016 to 18% in 2017.


 There are also other signs that internet users and companies are recognizing the problem of fake news. In a study this winter,
 <a href="http://www.niemanlab.org/2017/02/reddits-rworldnews-community-used-a-series-of-nudges-to-push-users-to-fact-check-suspicious-news/">
 J. Nathan Matias and other researchers at MIT
 </a>
 worked with Reddit to combat fake news by encouraging users fact-check potentially misleading stories, which doubled the number of comments with links on average, suggesting the users were backing up their comments with sources.
 <a href="https://www.journalism.cuny.edu/2017/04/announcing-the-new-integrity-initiative/">
 CUNY Graduate School of Journalism
 </a>
 recently joined Facebook and organizations like the Knight Foundation to announce the News Integrity Initiative to combat fake news. And on a more extreme level, last week Filipino senator Joel Villanueva proposed a bill that would jail or fine people and companies that spread fake news.

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 For now, Oliveira and Menczer recommend that social media sites reduce information load by restricting the posts from automated bots, which can manipulate sites by producing high volumes of low quality or inaccurate information. “We’re finding very strong quantitative evidence that social bots are very effective at getting fake news to go viral,” said Menczer.


 The group is currently working on studying and detecting automated bots to learn how to filter them out (much like spam filters for email).


 While the Menczer and Oliveira say that social media sites bear the brunt of the responsibility for dealing with this issue, they do recommend that individuals carefully check the sources of information and avoid sharing content without some critical examination. They also say people should not unfollow or unfriend people who hold different opinions. “That leads to echo chambers, which make us more vulnerable to misinformation,” Oliveira said.


 Wihbey agrees that bots are a significant problem. If platforms like Facebook and Twitter are better able to crack down on bots, he said, the high-quality information would have a better chance at spreading. By sharing their data sets, Facebook and other platforms could help researchers understand the relationship between virality and accuracy of information, he said, an increasingly important relationship in our democracy.


 While Wihbey admits that there are times in which low-quality information can be fun and amusing, social platforms and systems should take a harder look at how their algorithms treat credible content.


 “We have to acknowledge the limits of social media” Menczer said.


 Photo credit:
 <a href="https://www.flickr.com/photos/68532869@N08/17471462035/">
 Japanexperterna.se/Flickr (CC BY-SA)
 </a>

We’re being overwhelmed by social media posts—and our judgement is suffering as a result.

Scientists 'Teleport' Photons Into Space For the First Time

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 A
 <a href="https://arxiv.org/abs/1707.00934">
 team of researchers
 </a>
 set a record for quantum “teleportation” this week.
 

 In a first, scientists “teleported” information from Earth to space over a distance of over 300 miles. Previous experiments had done the same
 <a href="http://www.pbs.org/wgbh/nova/next/physics/scientists-generate-quantum-entanglement-in-space-for-the-first-time/">
 from space to Earth
 </a>
 and over shorter distances. Photon “teleportation” can enable long-range data encryption, and would be vital to a large-scale quantum computing network. But this doesn’t mean we’re ready to beam objects up to space.
 

 This transfer relies on the principle of entanglement, by which two particles are connected (regardless of distance) in that measuring one correlates to the state of the other. Using entanglement, the quantum state of a particle can be transferred to another, so it essentially assumes the identity of the other particle, much as we envision physical teleportation.
 
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<img alt="" class="richtext-image full-width" src="https://www.pbs.org/wgbh/nova/media/images/iss-40_thunderheads_near_borneo.width-990_yPo2CjP.jpg"/>
<figcaption>Scientists sent information between a high-altitude ground station in Tibet and a satellite in space.
 
 </figcaption>
</figure>

<a href="http://www.bbc.com/news/av/science-environment-40573621/first-object-teleported-to-earth-s-orbit">
 In an interview with the BBC
 </a>
 , Oxford professor Ian Walmsley explained that the team communicated information by harnessing the laws of quantum mechanics. They transferred information from a photon on Earth to a second photon up in a satellite, but did not physically send the first photon anywhere.
 

 Ryan Mandelbaum explains this phenomenon for
 <a href="https://gizmodo.com/scientists-teleport-a-particle-hundreds-of-miles-but-w-1796818859">
 Gizmodo
 </a>
 :
 
<blockquote>


 So, here’s a simplified version of quantum teleportation. Let’s say you take a red and a green ball, put each randomly into one of two bags, and hand one bag to a person on the ground, and another to a person at the satellite. But on the ground, there’s a second bag, containing another green ball that the folks on the ground want to “teleport” to the satellite, without anyone else knowing it was green. Quantum teleportation says that, with the entangled link already set up, the folks on the ground have only to open both of their bags, then call the satellite on the phone and say either “same” or “different.” If the ground observer opens both bags and sees both balls are green, she can just say “same” to the satellite. The satellite will then open his entangled bag, which has to have a red ball, which means the ground must have had the green ball in the entangled bag, and
 


 that
 


 means the secret ball had to be green.
 



 Thus, the state of the secret ball is “teleported” to the satellite.
 

</blockquote>

 In previous attempts, achieving great distances was challenging. Entanglement is fragile and easily disrupted as photons interact with matter over longer distances. Scientists have tested models of a quantum network by transmitting information through optical fibers, but the team from University of Science and Technology of China led by Chao-Yang Lu demonstrated much greater distances by using the vacuum of space, which has few particles with which the entangled photons might interact.
 

 Over the course of a month, the researchers sent millions of photons between the ground station and the Micius satellite, a sensitive photon receiver that reads information from photons on Earth. The ground station was placed at a high-altitude site in Tibet at over 13,000 feet above sea level to minimize disturbance from the atmosphere, which can disentangle photons. Over 900 of the transfers were successful. Based on satellite orbit, the photons were separated by between 310 and 870 miles.
 

 The “teleportation” process transfers qubits, or quantum bits of information. A quantum network would use entangled photons to share information. Measuring their state—the data encoded in the photon—would immediately disturb them. Thus, any attempts to read or interfere with messages outside of the receiver would instantly be detected.
 

 “This work establishes the first ground-to-satellite up-link for faithful and ultra-long-distance quantum teleportation, an essential step toward global-scale quantum internet,” the team wrote in this week’s paper.
 
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 Image credit: Expedition 40 crew member/NASA

Sperm counts in men from North America, Europe, Australia, and New Zealand have dropped by over 50 percent over the past 40 years.

Sperm Count is Decreasing in Rich Nations—and No One Knows Why

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 Over the past 40 years, sperm counts in men from North America, Europe, Australia, and New Zealand have dropped by over 50 percent, researchers announced on Tuesday.


 Researchers examined 7,500 studies conducted between 1973 and 2001. They selected 185 studies with consistent counting methods and performed analyses on data from almost 43,000 men.


 Their findings,
 <a href="http://dx.doi.org/10.1093/humupd/dmx022">
 released in
 
 Human Reproduction Update
 
</a>
 , showed that sperm concentration fell from 99 million per milliliter to 47.1 million per milliliter during the span of the study, indicating a 52.4% decline in sperm concentration and a 59.3% decline in total sperm count for men in these nations. What’s more, the scientists found that the decrease in sperm count is not slowing. As sperm counts have implications for morbidity and mortality, these results raise potential concerns for health and fertility.


 While previous studies on sperm count were criticized for not accounting for confounding variables like age, sexual activity, or infertility, this study used consistent sperm count methods and broad data sets from many locations to address these concerns.

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 The study did not directly address causes for the decline, though in interviews with
 <a href="https://www.newscientist.com/article/2141784-sperm-count-has-fallen-by-nearly-60-per-cent-in-richer-countries/#link_time=1501018098">
 New Scientist
 </a>
 , study author Shanna Swan of the Icahn School of Medicine at Mount Sinai indicated that since the decline occurred in these specific nations, there may be a causal relation with chemicals. The impact of chemicals, like phthalates that are often found in
 <a href="https://www.nytimes.com/2017/07/12/well/eat/the-chemicals-in-your-mac-and-cheese.html?_r=1">
 food packaging and make their way into nearly every brand of macaroni and cheese
 </a>
 , has been called into question lately by data that suggests they may interfere with testosterone production and endocrine systems.


 Here’s Kate Kelland,
 <a href="https://www.scientificamerican.com/article/sperm-count-dropping-in-western-world/">
 reporting
 </a>
 for Scientific American:

<blockquote>

 “This study is an urgent wake-up call for researchers and health authorities around the world to investigate the causes of the sharp ongoing drop in sperm count,” said Hagai Levine, who co-led the work at the Hebrew University-Hadassah Braun School of Public Health and Community Medicine in Jerusalem.


 The analysis did not explore reasons for the decline, but researchers said falling sperm counts have previously been linked to various factors such as exposure to certain chemicals and pesticides, smoking, stress and obesity.


 This suggests measures of sperm quality may reflect the impact of modern living on male health and act as a “canary in the coal mine” signaling broader health risks, they said.

</blockquote>

 But it’s not all bad news—47.1 million sperm per milliliter is still well above the 15 million sperm threshold that is considered low from a fertility standpoint. The study revealed no clear decline in sperm count for men in South America, Asia, or Africa, but the authors note that far fewer studies have been conducted in these regions.


 For now, the question of what is causing sperm count decline is still open, but the evidence of the trend is increasingly apparent.

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 Image credit:
 <a href="https://www.flickr.com/photos/82066314@N06/9233907080/">
 Iqbal Osman / (CC BY 2.0)
 </a>

An obvious decrease in sperm count amongst richer nations is showing no sign of slowing.

Scientists Have New Understanding of How Animals See Color

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 A few years ago, Professor Liz Tibbetts stumbled upon something surprising.  She noticed that wasps had striking facial features—including fake eyelines and distinctive marks.  At the time, people didn’t believe that wasps were able to see this kind of fine scale variation, but in the years since, her wasps have become a model system of how individual identities are displayed and perceived even in animals with tiny brains.
 

 “Animals use color in every context in very meaningful ways, you can look at social behavior, partners, enemies, or you can look at reproductive behavior, sexual selection, mate choice, escaping behavior and crypsis—every aspect of their life is impacted by color,” said Mark Hauber, Professor of Animal Behavior at the University of Illinois, Urbana-Champaign and one of the authors of a new review paper on the biology of color.
 

 Researchers know that animals are able to see and produce colors that humans cannot, specifically in the ultraviolet and infrared zone, but until recently they were not able to view the world as animals themselves see it. In the paper released in
 <a href="http://dx.doi.org/10.1126/science.aan0221">
 Science
 </a>
 this week, scientists showed that we are starting to understand how animals produce color and integrate information about it, and what implications that has for evolution. “We have tools which allow us to see how the bird sees a fruit item or how a predator sees an egg in a nest, instead of seeing the world through photographs,” said Hauber.
 
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<img alt="" class="richtext-image full-width" src="https://www.pbs.org/wgbh/nova/media/images/wasp.width-990_F7TR5xm.jpg"/>
<figcaption>Scientists didn’t believe that wasps were able to see fine scale variation, but they have become a model system of how individual identities are displayed and perceived even in animals with tiny brains.
 
 </figcaption>
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 Colors can emerge from pigments and chemicals (like traditional paints, or the fluorescence that gives us highlighters) or from structures (in which physical features manipulate light and allow us to perceive colors), and different species sometimes develop very similar features.  Humans, for instance, experience pigmentation changes due to the
 <a href="https://doi.org/10.1016/j.cell.2007.10.055">
 same signaling molecule as stickleback fish
 </a>
 .
 

 We perceive light and color through hue, saturation, and lightness using cones and rods.  Other animals experience different portions of the light spectrum, according to the paper. Birds have three cone types and can see in the ultraviolet. Certain types of fish can see different colors based on what they eat and many can see infrared light.
 

 A group of scientists ranging from evolutionary biologists to behavioral ecologists and anthropologists collaborated at a workshop in Berlin, exploring the role of color across animals.  By collectively examining hundreds of species, they examined color on scales as small as nanoscale features and cellular mechanisms, and as large as fully visible arrays. The team connected the sensory, cognitive, and neural bases of color in animals with the adaptive and evolutionary implications of coloration. “We can now ask questions about color from every angle, from the evolutionary to the mechanistic, to the perceptual and developmental aspects,” said Hauber.
 
<aside class="pulledquote">
 We can now ask questions about color from every angle, from the evolutionary to the mechanistic, to the perceptual and developmental aspects.
 </aside>

 The team pieced together a full picture due to advances in technology such as spectrophotometry, digital imaging, and computational tools that allow scientists to better quantify the full spectrum of colors, not just those visible to humans. The methods reveal the way that nanoscale features interact with light, how animal colors change over time, and what causes coloration.
 

 They also drew from advances in neuroscience and genetics, illuminating the way animals perceive color and the genetic changes that allow unrelated species to develop parallel or convergent phenotypes, which in this context means they developed similar observable colored features (like the fish and humans). Connecting these concepts allows scientists to ask questions about how one animal may develop camouflage based on what its predators can see, how great reed warbler birds distinguish their own eggs from parasitic cuckoo eggs, or about why some wasps can distinguish faces. “People are using these tools understand how social structures for instance in starlings effects colorfulness of females,” said Hauber.  “The more equitable and social a starling species is, the more colorful a female starling is because sexual selections works both ways.”
 

 This roadmap allows us to understand how our animal counterparts see color, and will help scientists develop new biomaterials or bio-inspired designs with applications for design, architecture, medicine, clothing, or security.  Beyond obvious applications for camouflage, by understanding how color is produced in nature, researchers can generate new materials with higher energy efficiency or that perform multiple functions, much like the colors present in animals.
 

 Hauber says scientists now need to explore pattern generation and recognition, diving deeper into how creatures like wasps can recognize facial features, and understanding the neurological aspects, and even probing color production in plant species.  “Both in insects with tiny brains and with monkeys and humans with facial recognition, we need to have a model for how color and pattern are perceived.”
 
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 Photo credit:
 <a href="https://www.flickr.com/photos/slgc/5994915303/">
 slgckgc / Flickr (CC BY 2.0)
 </a>

Alcohol May Boost Memory Formation After Learning

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 Drinking may not be so bad for your memory after all.
 

 In fact, a study released this week in
 <a href="https://www.nature.com/articles/s41598-017-06305-w">

 Nature Scientific Reports
 
</a>
 suggests that drinking alcohol right after learning something new might actually help your brain store that information more effectively than if you remained sober.
 

 While previous studies have examined the role of alcohol in memory formation, this study was one of the first to test this outside of a lab setting. The team from the University of Exeter studied 88 adults between the ages of 18-53.  Participants were asked to conduct the study in their own homes, and half were told to drink as much as they wanted. The other half had to remain sober. The sober and drinking groups had similar backgrounds in terms of age, body mass index, typical drinking habits, and incidence of blackouts.
 
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<img alt="" class="richtext-image full-width" src="https://www.pbs.org/wgbh/nova/media/images/4873748610_9d69c16d52_o.width-990_O8V4seV.jpg"/>
<figcaption>Researchers compared the performance of adults who drank as much as they wanted and those who did not drink during the evening on specific memory tasks for words learned before the evening began.
 
 </figcaption>
</figure>

 For participants, the study started—sober—at 6 pm. They first listened to 24 words that seemed similar to real words, but had extra letters (like frenzylk). At 7 pm, they were asked to remember the words based on the first few letters (an example prompt was frenzy_ _).  Around 8 pm, for half of the participants, the drinking began. And drink they did. The average person consumed about six drinks worth of alcohol.
 

 Two hours later, at 10 pm, participants were given a second, image-based task to test memory retention during drinking. They were shown 128 images and asked to categorize them as indoor or outdoor items. They were then presented with 192 images (some of which overlapped with the first 128), and asked whether each image was old (from the first set), similar (showed an old item in a new position), or new (had not appeared before).
 

 The next morning, after a night of drinking, the participants who consumed more alcohol answered correctly more often for the first task than those who drank less. The scientists had hypothesized that the memory boost would occur because drinking alcohol blocked individuals’ ability to form new memories while imbibing, leaving more resources to encode memories developed before. Beth Mole described the results for
 <a href="https://arstechnica.com/science/2017/08/booze-boosts-the-brains-ability-to-remember-info-learned-before-drinking/">
 Ars Technica
 </a>
 :
 
<blockquote>

 They were partly right. The drinkers did indeed perform better at the made-up word challenge. The sober group showed an ever-so-slight decline in remembering the words between the evening and morning tests. But the drinkers scored statistically significantly better the next morning than they did in the evening—not just the same as the evening. This hints at the idea that alcohol doesn’t simply help reduce forgetfulness; it may instead firm up freshly formed knowledge and enhance memory.
 

 Still, the results of the image-based memory challenge were not so crystal clear. Drinkers didn’t do worse than the sober folks. They all did about the same in both evening and morning tests.
 
</blockquote>

 If people who drank had scored worse on the image tests, the researchers would have had evidence to support their hypothesis that memory formation suffers while drinking, giving the brain time to consolidate older memories. That part, though, remains unsolved.
 

 Originally, the team had hoped to conduct the tests in an even more realistic setting for binge drinking like bars or clubs, but the businesses weren’t keen on the idea. “The most available option was to test participants in their homes during a drinking session that preceded a night out,” the researchers wrote.
 

 The team’s next experiments will explore how sleep may work together with alcohol to improve our memories. Alcohol, the researchers wrote, may boost the patterns in slow wave sleep—also known as deep sleep—that help us encode memories. If there is a link, it could explain the boozy memory boost and has been ignored by most other studies.
 
</section>

 Photo credit:
 <a href="https://www.flickr.com/photos/tegg/4873748610/">
 Pete Berlin / Flickr (CC BY-NC 2.0)
 </a>

Can Government Keep Up with Artificial Intelligence?

Artificial intelligence research is moving quickly. Can the government move quickly enough to effectively regulate it?

Bianca Datta

Articles