We're outnumbered -- that comes to 422 trees per human being. But their numbers are dwindling.
This year's El Niño is historically powerful, after unprecedented changes related to global warming, according to the World Meteorological Organization. Continue reading →
An icy moon of Saturn hangs against the face of its giant parent planet in a breathtaking new image captured by NASA's Cassini spacecraft.
A deep sea robot finds marine life rivaling that found at the Great Barrier Reef.
A pressure chamber used to simulate harsh environments, such as what exists on Venus, Saturn's moon Titan and the giant planets, is open for business at NASA's Glenn Research Center.
What started as a friendly competition between biologists has since turned into an all-out explosion of cuteness.
Gun violence works as a social contagion, say experts explaining a rise in violent crime across many U.S. cities.
Despite the most up-to-the-minute data, in the end it’s only somewhat better than a shot in the dark.
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