Nearly one million species could disappear due to human activity. Pulitzer Prize-winning author, Elizabeth Kolbert helps us understand what we'll lose.
Mussels once numbered the millions in the Ohio River. Now researchers are hoping to find a type of salamander that an endangered mussel needs to survive.
When you start out in birding, you get yourself a good pair of binoculars, a guide to birds, and some sturdy footwear. But something else you want to have is a mentor.
