Relativity Isn't Relative

If gravity is so attractive, why doesn't the earth just crash into the sun? Or the moon into the earth? The answer: Stable Orbits

Why Only Some Monkeys Have Awesome Tails

There's a really interesting idea in anthropology called the grandmother hypothesis, that basically says the reason we have grandmas has to do with what makes us unique as a species. But there's a huge problem with the idea that it's...

You may have heard that there's an ongoing shortage of the medication Adderall. But there's a lot more going on here than you may expect, and the real culprit behind the shortage isn't what you might think.

As we wrap up 2022, we'd like to celebrate a few of the cosmic “winners” discovered this year, at least while they still hold their titles.

Montana sapphires come in a beautiful array of colors found in a few other places in the world. But geologists have no idea where they originated.<br/>

Saturn's moons Janus and Epimetheus were once thought to be the same moon. It turns out they're dance partners.<br/>

Time travel stories are cool because both the past and future are somehow more interesting that the present and because everyone wants a redo. But so far it appears we’re doomed to live consumed by regret in the eternal, boring present....

You're peering into the Amazon River when, suddenly, you lose your footing and fall. Piranhas dart about in the rapidly approaching water. So, are you doomed? Will your fall trigger a feeding frenzy that will skeletonize your body within...

When we picture the first tetrapods, or land vertebrates, crawling out of the ocean, we probably imagine they need legs. But evolution also had to bestow another important adaptation before they could leave the water: blinking!

One Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute!

Bats sleep upside down, so how come they don’t fall? Turns out that they’ve got some unusual legs.

Jessi and Squeaks go on a winter scavenger hunt outside, and learn about all kinds of cool winter science - like different types of ice, dormant plants, and special signs of animals you can see in the winter!

Did you know that the biggest animal that ever lived is still alive today? Let's learn all about what blue whales eat, where they live, and just how big they are, with Jessi and Squeaks!

What is the derivative of a^x? Why is e^x its own derivative? This video shows how to think about the rule for differentiating exponential functions.

What is the derivative of a^x? Why is e^x its own derivative? This video shows how to think about the rule for differentiating exponential functions.

In which John Green discusses the strange and mutually beneficial relationship between a republic, the citystate of Venice, and an Empire, the Ottomans--and how studying history can help you to be a better boyfriend and/or girlfriend....

Mosquitoes transmit a number of terrible diseases like malaria, West Nile virus, and the Zika virus, but why not the flu?

If you've ever gone outside really early on a cold day in fall, you might have seen a thin layer of sparkly ice crystals covering everything! That ice is called frost, and it can only form if the weather is exactly...

In which John Green discusses the strange and mutually beneficial relationship between a republic, the citystate of Venice, and an Empire, the Ottomans--and how studying history can help you to be a better boyfriend and/or girlfriend....

It's really difficult for life to create blue pigments, but the color can appear in a handful of compounds that create just the right conditions to reflect blue photons.

Singing in Spanish, Portuguese and English, LADAMA brings a vibrant, energizing and utterly danceable musical set to the TED stage. In between performances of their songs "Night Traveler" and "Porro Maracatu," they discuss how...

Do periodical cicadas "know" how to calculate prime numbers? One of the strangest life cycles in all of biology, explained!