Animals

Engineers and paleontologists teamed up to reconstruct an ancestor of starfish from the Paleozoic era and figure out how it moved

To deal with invasive hippos that were brought to Colombia by drug lord Pablo Escobar—and that threaten the country’s biodiversity—the nation’s government is sterilizing, exporting and euthanizing the animals 

Standard English names for North American birds will now focus on the animals rather than people

The goofy-looking elephantnose fish “sees” its environment in three dimensions by creating a weak electric field and doing a little shimmy

A deep-sea expedition discovers a strange, dark world of strawberry squid and ratfish in cold-water corals near the Galápagos Islands

From sinking boats and feasting on shark livers to dining on whale tongue and tossing porpoises around for fun, orcas are displaying some fascinating—and sometimes terrifying—behaviors

Under the right conditions, the spadefoot tadpole will transform into a voracious predator of its own species.

Lions, tigers, bears: this creature sends all of those beasts running for the hills.

Postreproductive life was once thought to be confined to humans and a couple of toothed whales, but some wild chimpanzees experience it, too

Worsening heat waves in agricultural areas of the U.S. are affecting bird reproduction and nestling survival

Can something spring back to life if it last moved around when woolly mammoths roamed the earth? The answer appears to be yes.

Tiny mice found mummified at the summits of Andean volcanoes appear to be living in the harsh environment, which resembles Mars more than it does Earth