Guy, Ark., has been hit with hundreds of earthquakes in the last few months, leaving many trying to figure out what is causing all the shaking.

After conquering the Mississippi River, invasive Asian carp are now rattling the gates of the Great Lakes, threatening an economic and ecological disaster.

A brilliant starry sky illuminates the evening operations of Louisiana's Fort Polk.

Tornadoes have plagued the U.S. in 2011, leading to record death tolls and property damage across the country. To grasp the scope of devastation, MNN breaks down the numbers behind this year's historic storms.