Cicadas molt their exoskeleton—an insect’s hard outer shell—three to four times before becoming an adult.
Photograph by Pu Feng, Xinhua Press, Corbis
To defend themselves against predators, hagfish ooze oodles of slime in a fraction of a second from pores on their body.
Photograph by Brandon D. Cole, Corbis
On land, male hooded seals can inflate their nasal sac—a fleshy balloon above their nose—to attract females and display aggression toward other males.
Photograph by Doug Allan, Minden PIctures
Some dung beetles lay their eggs in balls of dung so that when the eggs hatch, the larvae use the ball as—gross!—their source of food.
Photograph by Nolte Lourens, Shutterstock
Most snakes shed their entire skin—even the layer over their eyes—several times a year.
Photograph by Modoki Masuda, Minden Pictures
Camel spiders often seek out shade from a person’s shadow to escape the desert heat.
Photograph by Chris Mattison, NPL, Minden Pictures
Lampreys grow 11 to 12 rows of teeth—and they even have teeth on their tongues to suck blood from other fish.
Photograph by Wil Meinderts, Buiten-beeld, Minden Pictures
Nearly blind, naked mole rats use their sensitive hairs to feel their way around underground.
Photograph by Neil Bromhall, Minden Pictures
A house centipede can hold at least four victims in its 30 legs, to eat later, while it catches and eats others.
Photograph by kurt_G, Shutterstock
The blobfish is part of a group of animals known as fatheads—a family of fish known for their huge noggins.
Photograph by Caters News Agency, Newscom
Click the full-screen arrows in the upper right to read the captions!