How much does the atmosphere weigh?

We know that air weighs 14.7 psi or pounds per square inch at sea level – meaning about 15 pounds are pressing down on every square inch of …

A member of a security team, left, talks with a local resident   amid the rubble of destroyed homes,  Tuesday May 21, 2013 in Moore, Okla.  Monday a massive tornado moved through Moore, Okla., flattening entire neighborhoods. (AP Photo/Brennan Linsley)

UA studying Oklahoma tornado

Researchers from the University of Alabama are part of a team studying the deadly tornado that struck Moore, Okla., last month.


Survivor talks about storm recovery

[lin_video src=×9&auto_next=1&auto_start=0&div_id=videoplayer-1369108304&hei…