Few animals can match the strength or grace of the big cats. A large male Siberian tiger, who eats anything from a frog to a bear, may weigh more than 600 pounds and be more than 12 feet long, se to tail. A lion's earsplitting roar can be heard up to 5 miles away. And in only a few seconds, the cheetah can go from 0 to 70 miles an hour - that's faster than the fastest racehorse! Whether they are running, climbing, or leaping, these bundles of muscle are always ready for action.