Judging by the 26 billion views on over 2 million YouTube videos of them, one thing is certain: cats are very entertaining. But their strange feline behaviors, both amusing and baffling, leave many of us asking: Why do cats do that? Tony Buffington explains the evolutionary history behind some of your cat’s strangest behaviors.

It's Halloween and a group of kids in costume explore a haunted house. They meet a ghost, a zombie, and other spooky but nice creatures.

An animated video of the festive British carol, “We Wish You a Merry Christmas.” The carol's origins are not known, but it was first written down in 1935 by Arthur Sydney Warrell, a Bristol choirmaster.

This song was written and sung by Bob Dorough. It teaches about the multiplication of 5 through a game of hide and seek, in which the seeker counts by fives.

In American schools, it's common for kids to have to learn the Preamble to the United States Constitution by heart. This song, from Schoolhouse Rock, is meant to give these kids a hand, even though it is a slightly abridged version.

Fracking is a controversial topic. This animated video tries to take a neutral look at fracking. It is relevant for all of us, because of high prices for energy and the danger to our drinking water.

This ancient mathematical trickery posits that a mighty hero cannot overtake a tortoise. Zeno of Elea (born c. 490 BCE) is the author of this and other paradoxes.

Dolphins are one of the smartest animal species on Earth. In fact, their encephalization quotient (their brain size compared to the average for their body size) is second only to humans. But exactly how smart are they? This video shares some incredible facts about dolphins.

“Peppa and George help build a house made of bricks. The Wolf Family moves into their new home, and tests it with a lot of huffing and puffing!”

Grandpa Pig is the best at mending things! But when Mummy Pig gives Grandpa Pig her old computer, it takes a little while for him to get the hang of it.

Santa has been to the house, and Peppa and George are enormously excited on Christmas morning. The other Pigs are less thrilled to be woken up at three o'clock in the morning, but soon they’re all tucking in to a delicious Christmas lunch, complete with crackers, Christmas pudding, and then presents!

Let's learn the colors with our little magic friend Groovy. He will transform into a paint brush and paint with different colors.

Groovy the magic Martian teaches us to count. We count animals at the zoo and cars on the street, then Groovy himself forms the numbers one to ten!

It’s Easter, and Grandpa Pig has hidden lots of chocolate eggs in his garden for Peppa and her friends to find. The hunt is really fun, but will everyone find an egg?

In this video, Groovy joins us for two well-known sing-along songs. Do you know the "Finger Family Song" and "The Wheels on the Bus"?

The catchy tune "Baby Shark" teaches us the names for various family members in English.

It’s a warm, sunny day, so what is making everything so cold? It’s Doctor Spooky, operating a giant robot! Can the Superzoo team stop to his plan to freeze the planet?! Catty and Monky jump straight into action.

Someone is creating a thick cloud of smoke that is polluting the planet… It’s evil Doctor Spooky again! The Superzoo team needs a solution fast so that they can thwart his horrible plan!

It looks like Kit will be late for school today, as a lot of strange events seem to be conspiring against him. But the worst is yet to come! When Doctor Spooky’s picnic goes wrong, he sets his robot to destroy the forest.

No sooner have the Superzoo team put the forest back the way it was, and Doctor Spooky is up to his tricks again! What’s his plan this time? To control people’s minds and make them drop litter on the beach!

Peter has a surprise for Lois, but not the kind she would necessarily hope for.

How can one brother travel into space and return younger than his twin? In just sixty seconds, a startling side effect of Einstein’s Theory of Relativity is explained to us.

Somehow the team needs to get the control baton away from Doctor Spooky, before the whole environment is trashed! How about distracting him by appealing to his vanity?

In this well-known and well-loved loved fairy tale, Rapunzel’s poor parents are forced to give her away as a baby to a wicked witch. When the child grows into a beautiful young woman, the witch hides her away in a tall tower in the woods. Will she ever be rescued from her lonely fate?