Today from SciShow World News Headquarters (Hank's office) - news about radiation risks, the most hi-def astronomy ever, and the truth about aquatic humanoids.

If you've ever seen a group of starlings in flight, you've appreciated one of nature's most hypnotic sights -- the lava-lamp-like flow of a murmuration. SciShow explains the biology and mathematics behind this beautiful phenomenon.

Is it possible that overfishing, super germs, and global warming are all caused by the same thing? In 1968, a man named Garrett Hardin sat down to write an essay about overpopulation. Within it, he discovered a pattern of human behavior...

Associate Producer Stefan Chin faces off against his boss, Hank Green. Will Stefan manage to keep his job? What does a dinosaur sound like? And where is that space whale?

From the very large to the very small, the universe is an amazing place. Here's my favorite ways to explore its scale.

You know that feeling, when you know a word but it's just out of reach, stuck on the tip of your tongue? Well, why does it happen? And what can you do about it?

The word "theory" is used very differently in casual everyday life vs. in science. In science, the word "theory" means so much more! Learn about what a scientific theory is with The Amoeba Sisters and discover why a scientific theory...

Losing half of the world sounds like a weird, abstract dream state. But for those that develop hemispatial neglect, that’s exactly what happens, without them even realizing it.

In 1920, Czech writer Karel _apek wrote a play about human-like machines, thereby inventing the term robot from the Central European word for forced labor. Jessica Oreck and Rachael Teel explain how the science fiction staple earned its...

It’s usually not a great idea to break laws, but breaking the laws of science is an exception! In fact, it’s often how we make progress.

What do fans of atmospheric post-punk music have in common with ancient barbarians? Not much ... so why are both known as _goths"? Is it a weird coincidence _ or is there a deeper connection stretching across the centuries? Dan Adams...

Mathematician Kelsey Houston-Edwards explains exactly what singularities are and how they exist right under our noses.

Scared of superintelligent AI? You should be, says neuroscientist and philosopher Sam Harris -- and not just in some theoretical way. We're going to build superhuman machines, says Harris, but we haven't yet grappled with the problems...

We know the universe will continue to expand forever, so now we can begin to complete the first Friedmann equation, and determine the shape and geometry of our universe. At first glance, it would seem that the equation doesn't quite add...

Originally meaning a woven container, the word keister has roots all over the place. The devil's tool box? Sure. A safe? That too. So, how did it become associated with the buttochs? Jessica Oreck and Rachael Teel get to the bottom of...

What do rap shows, barbershop banter and Sunday services have in common? As Christopher Emdin says, they all hold the secret magic to enthrall and teach at the same time — and it's a skill we often don't teach to educators. A longtime...

Our fundamental picture of the universe seems pretty nearly complete these days, to the point that some people are suggesting that we’ve arrived at some version of “the end of physics.” And sure, physics is at a turning point, but it...

From whirlpools and ravines to superlative beauty, what is the trajectory of the word gorgeous? Jessica Oreck and Rachael Teel reveal the surprising variations in meaning (and what turtleneck-like fashion has to do with it).

Physicists are used to the idea that subatomic particles behave according to the bizarre rules of quantum mechanics, completely different to human-scale objects. In a breakthrough experiment, Aaron O'Connell has blurred that distinction...

Sometimes being in a traffic jam can feel like being stuck in a clogged pipe. And it turns out, maybe that feeling isn’t too far off. Today we look at 3 things that are remarkably unlike fluids, yet still behave in liquid-like ways.

Hank continues our series on the four fundamental forces of physics with a description of gravitation -the interaction by which physical bodies attract with a force proportional to that of their masses, and which is responsible for...

In a fun, exciting talk, teenager Henry Lin looks at something unexpected in the sky: distant galaxy clusters. By studying the properties of the universe's largest pieces, says the Intel Science Fair award winner, we can learn quite a...

Being the only observable intelligent life in the universe gets lonely sometimes, so it's no wonder we're trying to find something out there to phone home about.

Over 2,500 years ago, one of ancient Greece's most celebrated popstars and erotic poets enraptured listeners. The singer-songwriter offered a uniquely intimate perspective on love, passion, and longing, and was the first on record to...