Or so we thought.

One last overview of autumn, my favorite season. Across the Northern Hemisphere, temperatures are dropping, harvests are in motion, animals are returning to their winter grounds, and of course, viewers are enjoying the explosion of colors among the leaves.

Overuse of the drugs has increased over the past few years. That's not good for human health.

They have endured so much, and to endure this, they’ll have to adapt dramatically.

The Cuban cricket crisis is the latest in a long history of human-animal misunderstandings.

Researchers are training dogs and rats to sniff out diseases—including cases that traditional medical techniques may not be able to detect.

Many animals regenerate the tiny hair cells that enable hearing—and there are promising signs that people can be made to do the same.

The first domesticated animals may have been tamed twice.

Scientists had no idea how an underwater Arctic volcano could sustain so much life. And then they noticed the black tubes.