Video: A devastating spinal injury left 11-year-old Mackenzie Saunders paralyzed after a soccer match. NBC's chief medical editor Nancy Syderman discusses the girl's road to recovery with Mackenzie and her parents.

Video: Amy Robach from the 'Today Show' takes a dip into the fragile world of ocean life and sea turtles.

Folk singer's March 16 concert celebrates wilderness through songs, stories and images.

The epidemic that is responsible for the deaths of thousands of bats in the eastern U.S. has been detected in Tennessee.