Doggie duty.

• Position: Dogs sense of smell on endangered animals - Brief article

A dog's sense of smell is an amazing tool. Man's best friends have been helping sniff out drugs, bombs and criminals for a while, but now conservationists are using them to find endangered animals and threatened plants. In Nevada, they have helped find the endangered desert tortoise. In the Atlantic Ocean, a dog perched in the bow of a boat has sniffed out the feces of the endangered and elusive North Atlantic right whale. In Washington, a Belgian sheepdog is helping researchers find the state's...