Did you play with glow in the dark toys as a kid? They’re super cool, but kind of mysterious. How do they glow after all? Hank explains the phenomenon in this quick question.

Two tiny handprints stamped into a cake. A mirror that shatters without warning. A trail of cracker crumbs strewn along the floor. Everyone at 124 Bluestone Road knows their home is haunted— but there's no mystery about the spirit...

The Carbon Impact of the World’s Largest Mass Migration

SciShow Space takes to you a world where the night is always dark, the tides are paltry -- and the days are only 8 hours long. See how different Earth would be if there were no moon!

Cave explorer and geologist Francesco Sauro travels to the hidden continent under our feet, surveying deep, dark places inside the earth that humans have never been able to reach before. In the spectacular tepuis of South America, he...

What was the 2012 Nobel Prize in physics given for? Capturing a single photon of light!

In this video Paul Andersen defines adaptations and explains how organisms can become better adapted to their surroundings using the process of natural selection. Specific examples of adaptations, like coat color in rock pocket mice, as...

Why is the universe organized the way it is? And why is it so empty? From planets and stars to superclusters and galactic filaments, the universe's largest structures formed because of its smallest. In this special collaboration with PHD...

Our bones are multi-functional body builders, but perhaps their most mysterious function is the production of blood. Scientists now think they have a pretty good idea why this is where our blood gets made.

If the universe is so vast and full of stars, why is the night sky dark?

Look alive, you! Today we’re diving into the science behind dark circles under your eyes, and all the things that might cause them – tiredness included.

How can the tiny moon eclipse the sight of the gargantuan sun? By sheer coincidence, the disc of the sun is 400x larger than the disc of the moon, but the sun is 390x farther from Earth -- which means that when they align just right, the...

There are about 500 species of squid, and they live in all the world's oceans, making them a reliable food source for whales, dolphins, sharks, seabirds, fish - and even other squid. As a result, the squid's most extraordinary...

In 1815, Lord Byron proposed a challenge to a few literary guests he had gathered in his house on Lake Geneva: Who could write the most chilling ghost story? This question sparked an idea in eighteen-year-old Mary Shelley who, over the...

Have you ever heard of the Peppered Moth? It's a great example of how living things can change because their environment has changed. And it's not just them! There used to be giant insects roaming the world, but they got smaller through...

Squeaks and Mister Brown learn all about echolocation, and how animals use it to sense things! First Grade Next Generation Science Standards Crosscutting Concept: Structure and Function: The way an object is shaped or structured...

Have you ever wondered why you look up and see a dark sky at night?

A few weeks ago we started an experiment where we planted some seeds to see how they would grow! Today we get to check out our results!

What's something that's neither vegetable or meat, digests food on the outside of its body, glows and the dark, and can go on top of your pizza? The amazing mushroom!

Thanks to the Space Telescope Science Institute (STScI) and NASA's James Webb Space Telescope for supporting this video! In particular, thanks to Dan Coe of STScI for taking the time to chat with me about what we do and don't know about...

Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn't so smart either. But now is not the time for regrets because you need to...

Potatoes are amazing! You can make them into french fries, baked potatoes, hash browns, potato chips, and tons of other tasty foods! And best of all, they're super easy to grow! Join Jessi and Squeaks to learn how!

If you live in the Northern Hemisphere, it's almost time for the summer solstice, the longest day of the year! But if all days have 24 hours, what does the 'longest day of the year' really mean? Join Jessi and Squeaks to find out!

Take a look... A VERY special guest, LeVar Burton, explains how Double Rainbows are formed.