Story
Standing dreamer
Giraffe Catnap
A giraffe may sleep for only a few minutes at a time, adding up to less than an hour of rest a day.
Animal group
Mammal wonders
Story
A tooth that senses the sea
The Unicorn of the Sea
A narwhal's long, spiraled tusk isn't a horn at all â it's actually a giant tooth, longer than a grown-up is tall, packed with nerve endings that can sense the water around it.
Story
Nature's engineer
The Beaver's Busy Dam
A beaver can chew through a tree trunk in one night and use it to dam a stream into its own private pond.
Story
Memory keeper
Wise Elephant
The oldest elephant in a herd remembers the way to water holes that only she has ever visited.
Story
Hidden warmth
The Bear's Black Skin
Under all that white fur, a polar bear's skin is actually jet black.
Story
Sound seeing
Bat's Echo Song
A bat sings tiny songs too high-pitched for human ears, then listens to the echoes to find its way through the dark.
Story
A pocket-sized start
The Kangaroo's Tiny Traveler
A newborn kangaroo is smaller than a jellybean and must crawl, blind and alone, straight up into its mother's pouch.
Story
Accidental gardener
Forgetful Squirrel
A squirrel buries hundreds of acorns every autumn, but forgets where it hid quite a few of them by the time spring comes.
Story
Floating together
Otters Holding Hands
Sea otters often hold paws while they sleep, so ocean currents don't drift them apart from each other.
Story
Ocean singer
The Whale's Long Song
A humpback whale can sing a song that travels for miles through the deep blue sea.
Story
One eye on watch
The Dolphin's Half-Awake Sleep
A dolphin sleeps with only half of its brain at a time, keeping one eye open to watch for danger.
Story
A garden in the fur
The Sloth's Green Coat
A sloth moves so slowly that tiny algae grow right in its shaggy fur, turning it a soft mossy green.