Nature’s anything but a safe place. Some of the creatures you’ll find out there are straight-up biological weapons. Get ready ...

The ostrich may have a goofy appearance, but in this amusing video, an ostrich runs right behind a group of cyclists like a velociraptor!

Many animals, both predators and prey, have evolved the ability to run two or three times faster than a man can. What are the adaptations that make these impressive performances possible?