Scientists don't yet know when or how the behavior evolved.
A tiny and very tubby baby pygmy hippo that was recently born at the San Diego Zoo is the zoo's first successful pygmy hippo birth in more than 30 years.
Researchers captured slow motion video of praying mantis strikes, revealing what makes these insects such effective predators.
Researchers discovered a new species while looking at Twitter photos. They have named the parasite Troglomyces twitteri.
The voice of a Chilean wild cat called a güiña, the smallest wild cat in the Western Hemisphere, was recently recorded for the first time — and it sounds like a cheeping bird.
Buckyballs are geometric shapes previously only seen in nature at the molecular scale. Scientists recently found them in marine animals dating to the Cretaceous.
A new paper gathers images of invasive Vespa hornet species worldwide, and offers clues to help identify them.
Tens of thousands of years ago, a feces-contaminated wallow may have caused the deaths of nearly two dozen giant ground sloths.
Comb jellies in the Baltic Sea eat their own larvae when the local food supply runs out every summer.
A squid-like creature was hunting for a meal about 200 million years ago, but it never got to gulp down its supper.
A years-long Allen Institute for Brain Science project to map the entire mouse brain is complete, and you can explore it now.
Sightings of Asian giant hornets in the state of Washington raise concerns that the enormous insects may be settling in North America.
A new Spinosaurus tail fossil shows that this hunter could slice through the water in pursuit of fish, becoming the first-known swimming dinosaur.
The oldest complete mammal fossil from the Southern Hemisphere is puzzling scientists with its mismatched body, strange skull holes and teeth that look like they're "from outer space."
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