What animal defends itself by squirting blood from its eyes? Which creature covers its enemies in slime? And just why do some beetles smother themselves in poop? Be prepared to be grossed out and amazed by a world of disgusting animal defenses.

What creature feeds on flakes of old, dead human skin? Which insect spends part of its life inside the body of another animal? And just what do male hippos use their dung for? Be prepared to be grossed out and amazed by a world of horrible animal habits!

In a prehistoric ocean, a huge predator is searching for food. It is hungry and ready to kill. Its powerful body is longer than a bus. Its enormous jaws can swallow a great white shark whole. The giant hunter is Megalodon, the largest shark that ever lived!

What fish defends itself with a deadly weapon? Which giant fish weighs as much as four adult humans? And can it really be possible for a fish to attack a crocodile? Some of these fish are enormous. Others are dangerous. And some are just plain weird. Meet the monster fish!

When someone strums a guitar, you hear music. When you chat with your friends, you hear their voices and your own. All day, every day, your sense of hearing is hard at work. Explore how your ears, nerve cells, and brain work as a team to help you hear the thousands of different sounds in the world around you.

When you sniff some milk that's bad, you smell the horrible, sour smell. When freshly baked cookies come out of the oven, the smell is wonderful. All day, every day, your sense of smell is hard at work. Explore how your nose, nerve cells, and brain work as a team to bring you thousands of different smells.

When someone strums a guitar, you hear music. When you chat with your friends, you hear their voices and your own. All day, every day, your sense of hearing is hard at work. Explore how your ears, nerve cells, and brain work as a team to help you hear the thousands of different sounds in the world around you.

When you take a bite of an apple, you taste sweet fruitiness. When you lick an ice-cream cone, your mouth is filled with icy-cold creamy flavors. All day, every day, your sense of taste is hard at work. Explore how your tongue, nose, nerve cells, and brain work as a team to help you enjoy the food and drinks that you love.

When you take a bite of an apple, you taste sweet fruitiness. When you lick an ice-cream cone, your mouth is filled with icy-cold creamy flavors. All day, every day, your sense of taste is hard at work. Explore how your tongue, nose, nerve cells, and brain work as a team to help you enjoy the food and drinks that you love.

When you open a book, you see words and pictures. When you play sports, you see the ball whizzing toward you at high speed. All day, every day, your sense of sight is hard at work. Explore how your eyes, nerve cells, and brain work as a team to help you see the world around you.

When you sniff some milk that's bad, you smell the horrible, sour smell. When freshly baked cookies come out of the oven, the smell is wonderful. All day, every day, your sense of smell is hard at work. Explore how your nose, nerve cells, and brain work as a team to bring you thousands of different smells.

When you stroke a kitten, you feel its soft fur. When you put a forkful of scorching-hot food into your mouth, you feel a burning pain. All day, every day, your sense of touch is hard at work. Explore how your skin, nerve cells, and brain work as a team to help you feel the world around you.