6.7-magnitude earthquake in central Chile

The earthquake took place 26 miles NNE of Valparaiso and 112 kilometers (69 miles) NW of Santiago. No tsunami warning issued. No immediate reports of injuries.

Emperor penguin colonies in Antarctica

Good news for penguin lovers! New satellite images show that there are twice as many emperor penguin colonies in Antarctica than previously thought.

Dead Sea from 1972 to 2011: View from space

Three Landsat images show the expansion of massive salt evaporation projects in and around the Dead Sea, over the span of 39 years.

Tornado outbreak leaves six dead in Oklahoma

At least six people died early Sunday after a tornado outbreak hit in Woodward, Oklahoma. Most of last night's tornadoes struck in Kansas.

National Weather Service tries more urgent voice in storm warnings

Do you think the National Weather Service using words like catastrophic and unsurvivable will help Americans tune in - or tune out - to tornado warnings?

Tornado outbreak potential for US Central Plains

Violent tornadoes appear likely in the U.S. Central Plains on Saturday, April 14, 2012. If you live there, be prepared for today's potential tornado outbreak.

White-nose syndrome likely caused by invasive fungal species

New research suggests that the fungus that causes the bat-killing white-nose syndrome is likely an invasive species introduced to North America from Europe.

Tsunami watch cancelled in Indian Ocean

These quakes were off the coast of northern Sumatra in Indonesia, where a 9.1-magnitude quake on December 26, 2004 triggered a tsunami that killed 230,000 people.

Texas tornadoes in 3D: View from space:

Watch an animation of the fierce April 3, 2012 Texas thunderstorms that was created from satellite data.

In March 2012, 15,000 warm temperature records broken in US

Some parts of the United States saw temperatures 20 to 40 degrees above average in March 2012.