For animals in the jungle--everything from jaguars to gibbons, and hummingbirds to orangutans--the struggle for survival in this crowded and competitive world has never been tougher. As jungle seasons become more unpredictable, only the toughest animals will triumph. | National Geographic TV

Alien or Earth creature? Meet the solifuge. Also known as the sun spider or sun scorpion, this fearsome arachnid doesn’t spin webs or deliver venom. About the length of a human hand, it’s equipped with massive claws and is hyper aggressive. Unlike spiders and scorpions, which can have up to twelve eyes, solifuges get by with just two. Instead, they rely on ultra-sensitive hairs covering their bodies to detect vibrations from moving prey. Once a target is locked, they unleash one of the fastest s