New research suggests humans lived in South America at the same time as now extinct giant sloths, bolstering evidence that people arrived in the Americas earlier than once thought.
In this Click & Learn, students explore factors that contribute to patterns seen in the Keeling Curve: a continuous record of atmospheric CO2 starting in 1958.
Scientists are studying dogs around the Chernobyl nuclear power plant to see whether anything in their genes helped their families survive the harshest, most degraded environments.
Our Medieval ancestors left us with a biological legacy: Genes that may have helped them survive the Black Death make us more susceptible to certain diseases today.
A hefty set of tusks is usually an advantage for elephants, allowing them to dig for water, strip bark for food and joust with other elephants. But during episodes of intense ivory poaching, those big incisors become a liability.
Male songbirds usually learn their tunes from adult mentors. But when aspiring crooners lack proper role models, they hit all the wrong notes — and have less success attracting mates.
Some beetles roll the flesh of dead animals into a ball and cover it in goop — all to feed their future offspring. Now scientists think that goo might do more than just slow decay. It also appears to hide the scent of the decomposing bounty and boosts another odor that repels competitors.
For the first time, scientists have shown that hummingbirds can sing and hear in pitches beyond the known range of other birds, according to research published Friday in the journal Science Advances.
