Passage 1: I have always been wary of cats, and now, walking alongside a 500-pound African black-maned lion, I know why. They remind me there is something higher than I am on the food chain. Josef, the lion beside me, is trained—'the best lion in the business,' his owner says, beaming. Josef has starred in movies and posed for film animators. Josef is a big-time Hollywood cat. But Josef is not tame. No big cat ever is—a difficult fact to ignore as we climb the hills near the ranch Josef calls home. He strides with the fluidity of unfurling silk, deliberately—not an ounce of tentativeness in each footfall. 'Cats don't rent; they own,' it is said. Lions own everything in sight. Passage 2: From Cathy Newman, 'Nature's Masterwork: CATS.' ©1997 by National Geographic Society. While packs of cave bears and saber-toothed tigers may once have terrorized early humanity, most regions of our planet have since been stripped of their descendants. And due to a variety of factors, many other 'man-eating' species now face the possibility of extinction. Their disappearance from Earth is a sobering prospect, not least because of the role they play in keeping us humble. The possibility of being prey, rather than agents of planetary dominion, keeps us acutely aware of our membership within the natural world. The emotions inspired by such possibilities remind us that the world is a dangerous, yet beautiful, place.