The raging wildfires in southern California have claimed lives and destroyed hundreds of homes. Learn how wildfires start and spread, and find out what firefighters do to battle the blaze.
San Francisco has a new airport that's supposed to stand up to the rigors of an earthquake. Does that mean that planes can land while a massive quake is shaking the city? See more »
At any moment, magma moving at 100 mph could rumble into the communities at this volcano's base. Scientists predict a massive eruption, but the question is when. See more »
You've probably heard people whispering about the end of the world coming up in 2012. But how do they know for certain? Where did the rumor start? See more »