A new tool tracks diseases, contaminants and other threats as they occur worldwide
The season's first cases of the West Nile Virus have been reported the past few weeks in places like Colorado and Pennsylvania. But lest you worry too much, take note: The U.S.
West Nile is back; Chameleons live the fast life; The world is becoming happier; and more. . .
What happened on June 30, 1908 in central Siberia? Was the atomic bomb–size airburst caused by antimatter? An extraterrestrial spacecraft? A wayward black hole?
President Bush declares a state of emergency as more than 1,000 blazes rage
Brain plaque without Alzheimer's symptoms; Teaching computers to teach better; Sweet plan to save the Everglades; From fins to limbs; and more...
A Q&A with an engineer who helped design the camera now imaging the surface of the Red Planet
Clone your dog; Stem cells help mend bones; Latrines cleaner than toilets; and more...
Annual contest held by Mars Society highlights robotic innovation and makes for some snazzy-looking rovers
NASA set to turn up the heat in Phoenix Mars Lander's soil-sniffing ovens
Pluto becomes just another plutoid; Predicting if coma patients will awaken; Brain protein stops alcoholism; and more...
More pictures from a traveling photo exhibit of creatures on the brink
Anthropologists say women prized since 5000 B.C.; New mega-Earth discovered; Making fuel from car exhaust; and more...
New instrument will look at gamma rays blasted out by the most powerful events in the universe
New wildlife campaign displaying poignant portraits of the planet's endangered creatures
Read about a paleontologist some call a real-life Indiana Jones and why the Mayan Empire fell
First dino footprints found in the region shed light on sauropod herding behavior
Researchers transfer DNA from the long-vanished Tasmanian tiger into a mouse
Widespread evidence links global warming to an array of environmental effects
How a once-wet landscape became one of the world's great deserts