Hanover Evening Sun on MSN

Stone wall toppled near Devil's Den at Gettysburg National Military Park

The Gettysburg battlefield's non-profit asked visitors to be the "eyes and ears" of the park service after a wall was damaged amid a federal shutdown.
Green Matters on MSN

These Towering Crystal Structures Rising From Cave Floors Follow a Mathematical Rule With Precision

Called 'stalagmites,' these crystal structures hold the past record of the cave's geological history. The secret lies in ...