Death Valley's Racetrack Playa is the scene of an enduring scientific mystery: Rocks of all sizes seem to move uphill on their own, leaving tracks in the mud behind them. Now, scientists finally have an answer.
A glimmer of good news for those who don't like shoveling: The intensity of snowstorms is not likely to increase as the planet warms, although fierce snowstorms will become more frequent this century, say scientists.
The continental margins off the US East Coast are sending bubbles of methane into the water. These naturally occurring seeps could provide a critical baseline to gauge the effect of climate change on these emissions.
The US Army tested its Advanced Hypersonic Weapon on Monday at the Kodiak Launch Complex in Alaska, destroying the vehicle seconds after liftoff after a technical glitch prompted the test to be scrubbed.