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The cartoonist Peter Kuper has filled a corridor with drawings of monarchs, depicting the beauty of the annual mass migration to Mexican forests -- as well as its perils.

To escape predators, dwarf reed snakes trade slithering for rolling to safety.

The man who helped develop the technology for liquid crystal displays -- the screens in flat-panel televisions and laptops -- has died at 101.

Countries renewed their promises to protect wildlife at U.N. talks in Armenia, but how to cover the costs remains a question.

The system that has driven life-altering discoveries and helped make the United States a superpower is now under intense strain.

As many as 40 percent of injured soldiers face severe infections that can lead to amputations and death. One initiative is trying to fix that.

Experts warn that online black markets for mummified remains could pose health risks.

Minerals in the space rock provide hints about the early history of the red planet, when water was flowing on the surface.

Stewart's iconic "Star Trek" character inspired astronomers and astronauts in countless ways: "You were the captain of my childhood," one astrophysicist said.

In Armenia, a three-legged Caucasian leopard's astonishing hike signals that conservation efforts for the endangered animal may be working.