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Category: Biology

We taught bees a simple number language – and they got it

We taught bees a simple number language – and they got it

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Maybe the differences between human and non-human animals are not as great as we might previously have thought. from www.shutterstock.com By Scarlett Howard, Université de Toulouse III – Paul Sabatier; Adrian Dyer, RMIT University, and Andrew Greentree, RMIT University Most children learn that written numbers represent quantities in pre-school or junior primary school. Now our new study shows that honeybees too can learn to match symbols and numerosities, much like we humans do with Arabic and Roman numerals.

In ecology studies and selfless ants, E.O. Wilson finds hope for the future

In ecology studies and selfless ants, E.O. Wilson finds hope for the future

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Claudia Dreifus writes: No one else in biology has ever had a career quite like that of Edward O. Wilson. One of the world’s leading authorities on ants, an influential evolution theorist, and a prolific, highly honored author, E. O. Wilson—his first name comes and goes from bylines, but the middle initial is ever-present—has over several decades been at the center of scientific controversies that spilled out of the journals and into wider public awareness. Among activists in the environmental…

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Green monkeys borrow vervet monkeys’ eagle warning call when threatened by drones

Green monkeys borrow vervet monkeys’ eagle warning call when threatened by drones

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Smithsonian.com reports: Some 40 years ago, scientists discovered that East African vervet monkeys (Chlorocebus pygerythrus) produce distinct alarm calls when they encounter their three main predators: leopards, snakes and eagles. Their cousins in West Africa, green monkeys (Chlorocebus sabaeus), are also known to cry out at the sight of leopard and snakes, but for some unknown reason, they don’t seem to emit a unique call for birds of prey. A team of researchers recently discovered, however, that the sight of…

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The myth of the eight-hour sleep

The myth of the eight-hour sleep

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Stephanie Hegarty writes: We often worry about lying awake in the middle of the night – but it could be good for you. A growing body of evidence from both science and history suggests that the eight-hour sleep may be unnatural. In the early 1990s, psychiatrist Thomas Wehr conducted an experiment in which a group of people were plunged into darkness for 14 hours every day for a month. It took some time for their sleep to regulate but by…

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Like humans, ravens mirror the distress they witness in others, study suggests

Like humans, ravens mirror the distress they witness in others, study suggests

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Katherine J. Wu reports: Seeing someone else suffer a big disappointment can have a pretty damaging effect on your own morale. That’s definitely the case with people—and it might be true for ravens, too. New research suggests that, like humans and many other mammals, common ravens (Corvus corax) can read and internalize the emotional states of others. In the study, published today in the journal PNAS, ravens watch their friends grapple with a frustrating task in which they’re denied a…

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The fast food of coral reefs

The fast food of coral reefs

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Ed Yong writes: Although coral reefs are home to bustling communities of gaudy marine life, half the fishes that live there are hardly ever seen. Aptly known as cryptobenthics—literally “hidden bottom-dwellers”—these species are mostly shorter than two inches and usually hidden in crevices. If you snorkel past, they’ll scurry away. But Simon Brandl of Simon Fraser University has made a career of studying them. And he and his team have now shown that cryptobenthics are a crucial component of healthy…

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Humans are killing off most large wild animals as sixth mass extinction advances

Humans are killing off most large wild animals as sixth mass extinction advances

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The Guardian reports: Humanity’s ongoing destruction of wildlife will lead to a shrinking of nature, with the average body size of animals falling by a quarter, a study predicts. The researchers estimate that more than 1,000 larger species of mammals and birds will go extinct in the next century, from rhinos to eagles. They say this could lead to the collapse of ecosystems that humans rely on for food and clean water. Humans have wiped out most large creatures from…

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I’m an evolutionary biologist – here’s why this ancient fungal fossil discovery is so revealing

I’m an evolutionary biologist – here’s why this ancient fungal fossil discovery is so revealing

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Do fungi like this Penicillium mold, which produces the the antibiotic penicillin, trace their origins to an ancestor that lived a billion years ago? Rattiya Thongdumhyu/Shutterstock.com By Antonis Rokas, Vanderbilt University Biologists don’t call them “the hidden kingdom” for nothing. With an estimated 5 million species, only a mere 100,000 fungi are known to scientists. This kingdom, which includes molds, yeasts, rusts and mushrooms, receives far less attention than plants or animals. This is particularly true for fossils of fungi,…

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‘Wood wide web’ — the underground network of microbes that connects trees — mapped for first time

‘Wood wide web’ — the underground network of microbes that connects trees — mapped for first time

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Science reports: Trees, from the mighty redwoods to slender dogwoods, would be nothing without their microbial sidekicks. Millions of species of fungi and bacteria swap nutrients between soil and the roots of trees, forming a vast, interconnected web of organisms throughout the woods. Now, for the first time, scientists have mapped this “wood wide web” on a global scale, using a database of more than 28,000 tree species living in more than 70 countries. “I haven’t seen anybody do anything…

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If reason exists without deliberation, it cannot be uniquely human

If reason exists without deliberation, it cannot be uniquely human

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By Justin E H Smith Philosophers and cognitive scientists today generally comprehend the domain of reason as a certain power of making inferences, confined to the thoughts and actions of human beings alone. Like echolocation in bats or photosynthesis in plants, reason is an evolved power, but unlike these, the prevailing theory goes, it emerged exactly once in the history of evolution (porpoises and shrews also echolocate, cyanobacteria photosynthesise). Reason is exceedingly rare, a hapax legomenon of nature, and yet this…

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Inside the nucleus, genes’ activity may depend on their location

Inside the nucleus, genes’ activity may depend on their location

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Jordana Cepelewicz writes: The nucleus of a cell has something in common with a cardboard box full of kittens: People get so fascinated by the contents that they overlook the container. The nucleus itself is often treated as no more than a featureless membranous bag for holding the vitally dynamic genetic material. Yet in fact it has specialized parts and an internal architecture of its own, and scientists have long speculated that precisely how the DNA positions itself with respect…

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Humans are not off the hook for extinctions of large herbivores — then or now

Humans are not off the hook for extinctions of large herbivores — then or now

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Hippos at Gorongosa National Park. Brett Kuxhausen, Author provided, Author provided By René Bobe, University of Oxford and Susana Carvalho, University of Oxford What triggered the decline and eventual extinction of many megaherbivores, the giant plant-eating mammals that roamed the Earth millions of years ago, has long been a mystery. These animals, which weighed 1,000kg or more and included the ancient relatives of modern elephants, rhinos, hippos and giraffes, reached a peak of diversity in Africa some 4.5m years ago…

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Face it: A farmed animal is someone; not something

Face it: A farmed animal is someone; not something

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Lori Marino writes: We’ve all heard them and used them – the common references to farmed animals that appeal to the worst part of human nature: ‘pearls before swine’, ‘what a pig’, ‘like lambs to the slaughter’, ‘bird brain’. These phrases represent our species’ view of farmed animals as not particularly bright, uncaring about their treatment or fate, and generally bland and monolithic in their identities. My team of researchers asked: ‘What is there to really know about them?’ Our…

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Humans are wiping out life on Earth

Humans are wiping out life on Earth

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The New York Times reports: Humans are transforming Earth’s natural landscapes so dramatically that as many as one million plant and animal species are now at risk of extinction, posing a dire threat to ecosystems that people all over the world depend on for their survival, a sweeping new United Nations assessment has concluded. The 1,500-page report, compiled by hundreds of international experts and based on thousands of scientific studies, is the most exhaustive look yet at the decline in…

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Why speech is a human innovation

Why speech is a human innovation

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By Tom Siegfried Except for various cartoon characters, the Geico Gecko and Mr. Ed, animals can’t speak. Yet they have a lot to say to scientists trying to figure out the origins of human language. Speaking isn’t the only avenue for language. After all, linguistic messaging can be transmitted by hand signals. Or handwriting. Or texting. But speech is the original and most basic mode of human communication. So understanding its origins ought to generate deeper comprehension of language more…

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Biodiversity crisis is about to put humanity at risk, UN scientists to warn

Biodiversity crisis is about to put humanity at risk, UN scientists to warn

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The Guardian reports: The world’s leading scientists will warn the planet’s life-support systems are approaching a danger zone for humanity when they release the results of the most comprehensive study of life on Earth ever undertaken. Up to 1m species are at risk of annihilation, many within decades, according to a leaked draft of the global assessment report, which has been compiled over three years by the UN’s leading research body on nature. The 1,800-page study will show people living…

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