Could this repeated signal be new tool for predicting earthquakes from volcanic activity?
Alterations in the rock formations' growth in Indiana cave could provide clues about past earthquakes in the Midwest.
An undergraduate college student may have found a way to warn people up to 30 minutes in advance that a tornado is on the way.
The "Big One" may be many smaller ones.
Long ago, life was nasty, brutal and short -- and well organized.