Plasma from the sun slammed into Earth's magnetic field Tuesday afternoon. Here's a look at what kind of northern lights show the collision will put on.
The first half of 2010 was the hottest six-month period recorded globally with temperatures around the globe 2 to 3 degrees Fahrenheit above averages.
Storm chasers have wrapped up the most dangerous stage of a comprehensive study on how tornadoes form.
President Obama on Thursday made his fourth visit to a battery manufacturer since taking office. He's pouring money and political attention into an industry that's playing catch-up – but that is vital to the future health of the domestic auto industry.
Giant propeller-shaped structures appear to be created by a new class of hidden moons.
Hurricane Alex has pushed oil from the BP Gulf oil spill spill onto Gulf coast beaches, with some tar balls as large as apples.
Climate change emissions are cooling the upper atmosphere, decreasing atmospheric density and causing space junk to remain in orbit longer.
The VORTEX-2 tornado research project completed last week aims to increase warning times and reduce false alarms.
WATERMELON FEAST: Kids participate in a watermelon eating contest at Tolmachoff Farms' Family Farm Day in Glendale, Ariz., in this June 2006 photo.
Amateur astronomers gathered last Saturday in New York City's Battery Park for an evening of stargazing as part of the 2010 World Science Festival.