Communing with nature has its risks. You can end up on the menu or coming between a mom and her calves. In either case, your life is on the line.

Bites come in all shapes and sizes—from miniscule to massive—but all can take a life. Surprisingly, the cure can be just as dangerous.

Two brutal incidents—a double-mauling and a marine mystery—scar their victims' bodies and minds, but nature calls them back to face their fears.