Vampire bats that regurgitate blood for roosting buddies. Mosquitoes that filch honeydew droplets from ants. Reptiles that enforce chastity on their lovers with copulatory plugs. Capuchin monkeys that use millipede secretions as mosquito repellent. T...

The Great Plains were once among the greatest grasslands on the planet. But as the United States and Canada grew westward, the Plains were plowed up, fenced in, overgrazed, and otherwise degraded. Today, this fragmented landscape is the most endanger...