Dolphins keep one half of this active while they sleep.
What is their brain?
By forgetting where they stored food, this animal is helping regrow forests.
Who are squirrels?
This is the largest animal (to our knowledge).
Who are blue whales?
They are one of the closest living relatives to T. rex.
Who are chickens?
Don't be fooled, Doc, rabbits should only eat these as treats.
What are carrots?
Made up of 90% water, these blobby beings have been on Earth for millions of years.
Who are jellyfish?
These birds not only use tools, but even make them.
Who are crows?
Their name comes from the Ancient Greek "river horse."
Who are hippos?
Cows move this about 30,000 times a day.
What are jaws?
Dogs have about 100 facial expressions, mostly using this part of their body to create them.
What are their ears?
These fish are the only ones who swim upright.
Who are seahorses?
This is the only bird that can fly backwards.
Who are hummingbirds?
You can tell the difference between this animal's two species by their ears.
Who are elephants?
With poor eyesight, their sense of smell helps this animal find food.
Who are pigs?
This breed of dog's sense of smell can be used as evidence in court.
Who are bloodhounds?
Sharks are the only fish who have these.
What are eyelids?
This mammal can spend 90% of their life upside-down.
Who are sloths?
This bear's bite is strong enough to crush a bowling ball.
Who are brown bears?
Goats prefer humans to have this on their faces.
What are smiles?
This companion animal can run 12mph, and sprint at 30mph.
Who are cats?
Unlike humans, who only have 1 of these, octopuses have 3.
What are hearts?
This animal has fingerprints that are almost identical to human fingerprints.
Who are koalas?
Even though they have a vocal box, this animal can't make sounds with their vocal chords.
Who are giraffes?
Benjamin Franklin called this animal "much more respectable" than the bald eagle.
Who are turkeys?
Also known as a binky, rabbits do this when they are happy.
What is jumping?