Animals

Dogs can smell when people are stressed, and it seems to make them feel downhearted

Cocaine has been detected in sharks for the first time, but scientists aren’t sure of the impact

A bizarre fossil of a Cambrian creature that looked like an “alien fish taco” reveals how a single group with jaws came to account for around 90 percent of all animal species on Earth

Pugs, Boston terriers, bulldogs and boxers—dogs with less wolflike facial features are worse at conveying their feelings

How falling cats, slithering snakes, burrowing prairie dogs and more exploit the laws of physics

Warm-blooded island species tend to evolve a slower metabolic rate compared with their mainland counterparts, making it harder for them to bounce back when under stress

Claims that Przewalski’s horses were discovered in the U.S. are unverified. But the conservation story behind the last truly wild horse is worth your time.

A low-tech immune boost may help some species of frogs survive a brutal fungal disease that’s already ended 90 amphibian species

Mosquitoes carry a pair of hormones, one of which drives bloodlust while the other signals satiation, scientists say

Przewalski’s horses, once extinct in the wild, are revitalizing Kazakhstan’s “Golden Steppe”

It turns out there’s little good evidence that pets benefit our physical or mental health

Scientists finally know how a gelatinous deep-sea creature keeps its cells from paralysis under pressure