By studying how beetles can trap air to keep from drowning, researchers suggest a trick that could help people breathe underwater.

El Nino conditions have developed in the tropical Pacific and are likely to continue into early 2007.

Jesse Sullivan is first amputee with a thought-controlled artificial arm.

Neanderthals might have endured thousands of years longer than previous thought, increasing the possibility they interbred with humans.

Changes in the brightness of the Sun had little affect on Earth's unusual warming since the 17th century.

A group of 14 turtles, very sick last fall and now robust, were released after being treated on Cape Cod's Dowses Beach. Credit: NOAA