In a nuclear explosion, how close you are impacts your chance of survival. But who you are also has more influence than you might think. If everyone on Earth were equidistant from the bomb, here's the last person...

What was the biggest volcanic eruption of all time? Was it a huge explosion like Mt. Tambora? Not even close. In this episode, SciShow takes on the biggest volcanic eruptions to ever happen.<b<br/>r/>

Hosted by: Savannah Geary (they/them)

Not long after the supernova of 1604, the telescope was invented. But astronomers would have to wait nearly FOUR CENTURIES to witness the next supernova that was visible to the naked eye. It was 1987, and a blue supergiant in the Large...

Evolution vs Natural Selection

How To Detect A Secret Nuclear Test

In this SciShow Kids compilation, Jessi and Squeaks learn all about dinosaurs—when they lived, how they died, and how we know so much about them.<b<br/>r/>

If you could survive a trip to the very first moments of reality as we know it, what color would you see?

Supernovae are only rare to the passive stargazer, but if you’re an astronomer studying them, you get to see some of the most brilliant explosions in the universe. Here are five of the most significant supernovae known to science.

Many space missions take billions of dollars and decades of work to get develop, but 25 years ago this spacecraft delivered stunning results on a shoestring budget and a minimal development timeline.

Lizards are incredibly widespread and diverse but it took them a long time to get to where they are now. Because they used to face some pretty stiff competition from a group of lizard look-alikes.

The biggest turtle ever described wasn’t an ancestor of today’s leatherback turtles or any other living sea turtles. But it looks like there are some things about being a giant, skin-shelled sea turtle that just work, no matter where, or...

Once upon a time, there was a lake that was so radioactive, that standing on its shore for more than an hour would almost definitely kill you. Join Olivia to learn how it got that bad in the first place, and what was done to fix it!

Thanks to LastPass for sponsoring this video. Check out LastPass hereref='http://bit.ly/2GbcEci' target='_blank' rel='nofollow'>here Fusion power is supposed to save us from fossil fuels, so when is nuclear fusion going to be a...

SciShow takes you inside a limnic eruption, a natural disaster that’s as deadly as it is rare.

It has been nearly three weeks since an enormous explosion at Beirut’s port tore through the city. With Lebanon already suffering from food scarcity, economic collapse and the coronavirus pandemic, the blast turned a grim situation to...

It has been one week since an earth-shattering explosion ripped through Beirut, killing at least 220 and injuring thousands more. Since then, Lebanese have experienced sadness, rage and recrimination, with many blaming the blast on...

In which Hank and John Green teach you a Crash Course on the modern revolution, and the upside of the progress that humanity has made in the last 500 years or so. And while there are two sides to every history, and many of these changes...

Paul Andersen explains how to use mathematics appropriately. He begins by emphasizing the important role that mathematics plays in the life sciences today and in that the future. He describes important mathematical equations in each of...

Thanks to Google Making and Science for supporting this series, and to Sean Carroll for collaborating on it!



This video is about why there's no such thing as cause and effect at the level of fundamental particle...

How To Detect A Secret Nuclear Test

In which Hank and John Green teach you a Crash Course on the modern revolution, and the upside of the progress that humanity has made in the last 500 years or so. And while there are two sides to every history, and many of these changes...

We only know 4% of what the universe is made up of. Can we also know what lies beyond our galaxy ... and if there are undiscovered forms of matter? Luckily, we have space messengers - cosmic rays - that bring us physical data from parts...

Nuclear weapons are the most destructive things we’ve ever created, but it turns out there’s a way to make them even deadlier…

Stars are our stellar alchemists. They spend their entire lifespan creating and molding elements. In their final moments, a supernova spreads these elements out into the universe, providing the building blocks for new stars, planets, and...