Dig deep into the often misunderstood world of spiders and discover how fascinating they really are. With more than 40,000 species recorded, they're an indispensable part of any ecosystem. Watch spiders that fly, spiders that jump more than 40 times their own height, others that spit to hunt and even ones that live underwater. Plus, see why spiders eat their own webs when they're done with them and find out why the scariest-looking spiders are often the least harmful.