The wasp that brainwashed the caterpillar: evolution's most unbelievable solutions to life's biggest problems

You absolutely must get laid. Antechinus ; Anglerfish ; Flatworm ; Mustache toad ; Toadfish

You can't find a babysitter. Ant-decapitating fly ; Glyptapanteles wasp ; Asp caterpillar ; Ocean sunfish ; Lowland streaked tenrec ; Surinam toad

You need a place to crash. Pearlfish ; Tongue-eating isopod ; Pistol shrimp ; Sociable weaver ; Hero ant

You live in a crummy neighborhood. Water bear ; Diving bell spider ; Zombie ant ; Pink fairy armadillo ; Naked mole rat

Turns out getting eaten is bad for survival. Hagfish ; Axolotl ; Cuttlefish ; Satanic leaf-tailed gecko ; Pangolin ; Crested rat

It turns out not eating is also bad for survival. Giant African land snail ; Aye-aye ; Mantis shrimp ; Bone-eating worm ; Tiger beetle

You can't let them get away that easily, can you?. Bolas spider ; Velvet worm ; Geography cone snail ; Lamprey ; Assassin bug

A few parting words.