Bears are very smart and have been known to roll rocks into bear traps to set off the trap and eat the bait in safety.Bears can run up to 40 miles per hour, fast enough to catch a running horse. The fastest known human alive today is Usain Bolt, who can run 27mph.Unlike many mammals, bears can see in color.Bears have been known to eat almost anything, including snowmobile seats, engine oil, and rubber boots.Bears can see almost as well as humans, and they can hear a little better. But they can smell much better. In fact, a bear’s sense of smell is around 100 times greater than a human’s. Polar bears can track down an odor from 20 miles (32 km) away. They can smell a dead seal under 3 feet of solid ice.