New research finds extinction rates have been declining for a century, challenging assumptions of an ongoing mass extinction.

Measuring our own heart rate seems like a straightforward idea, but how would you go about taking the pulse of a grasshopper or a spider? A new technique has been developed to measure the heart rate ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The sensitive ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. With the help of ...

Paleontologists have identified a new finger-sized hunter from the Cambrian seas, whose fossils preserve eyes, nerves, gut, and even traces of blood. The creature, named Mosura fentoni, prowled ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A shimmering ...

Lice, bed bugs, ticks, leeches, and other tiny blood-sucking crawling creatures are regarded as nasty vampires, causing itches, eliciting disgusting feeling, vectoring human and animal diseases, and ...

Move over, Simone Biles. Nature’s gold medalist for backflips is a millimeter-tall arthropod that can barely straddle the tip of a pencil. “Nothing on Earth does a backflip faster than a globular ...

Around half a billion years ago, in what is now the Yunnan Province of China, a tiny larva was trapped in mud. Hundreds of millions of years later, after the mud had long since become the black shales ...