Did you know that your environment and lived experiences can actually affect your DNA? Welcome to the world of epigenetics! In this fun episode of SciShow, Hank & his clone Circus Hank explain the power of epigenetics, which studies the...

If you've never had a migraine, you might think it's just a really bad headache. But if you've ever had them, or you know someone who does, you know that they're much worse -- and much more complicated -- than that. Hank explains the...

Eliminating certain species of mosquitoes could make summertime more enjoyable and cut down on the transmission of certain diseases. And scientists are looking into doing this by manipulating a single gene!

The weak force has been causing trouble for a century, ruining everything physicists thought was true. But it might actually be responsible for your very existence.

Could the next wonder drug be somewhere in Canada's snowy north? Take a trip to this beautiful, frigid landscape as chemist Normand Voyer explores the mysterious molecular treasures found in plants thriving in the cold. These scarcely...

It's time for the Myth Olympics: the eternal arena in which creatures and deities compete for glory. Almost every mythical tradition claims one creature as the fastest— from goddesses who run like the wind to creatures who outstrip every...

Thomas Jefferson, founding father of the United States and primary author of the Declaration of Independence, was part of America's fight for freedom and equality. But in his personal life, he held over 600 people in slavery. Are his...

What is integration? Why is it computed as the opposite of differentiation? What is the fundamental theorem of calculus?

This week on Crash Course Mythology, we're getting urban. Mike Rugnetta is the man with the orange umbrella who's about to give you a free tour of mythical cities. We'll talk about a few cities that didn't exist, but we're going to focus...

How is it that Beethoven, who is celebrated as one of the most significant composers of all time, wrote many of his most beloved songs while going deaf? The answer lies in the math behind his music. Natalya St. Clair employs the...

Journalist Andrew Marantz spent three years embedded in the world of internet trolls and social media propagandists, seeking out the people who are propelling fringe talking points into the heart of conversation online and trying to...

Introverts can often feel antisocial, but they are not always the same thing. In fact, psychologists found that they have great differences in their brain’s structure and function.

Today, in our final lab, Jabril tries to make an AI to settle the question once and for all, "Will a cat or a dog make us happier?" But in building this AI, Jabril will accidentally incorporate the very bias he was trying to avoid. So...

The universe is made up of information, similar to a computer, and physics (you know, the basis of the universe) certainly is based on computational principles. But is it running some grand program? Will the answer be 42? Make sure you...

Has a fifth fundamental force been discovered and how will this effect our understanding of the universe?

If you feel something inside you say, “I really don’t think you’re strong enough,” you don’t necessarily have to trust that little voice—it might not know you as well as you think it does.

Whether you're a Beyonce fan or faithfully following Phish- your personal taste in music is probably all linked to your memories.

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Is the War on Drugs doing more harm than good? In a bold talk, drug policy reformist Ethan Nadelmann makes an...

Popular culture has occasionally touched on the idea that people with depression are more objective judges of the world around them, but research has shown that’s not necessarily true.

When Amy Green's young son was diagnosed with a rare brain tumor, she made up a bedtime story for his siblings to teach them about cancer. What resulted was a video game, "That Dragon, Cancer," which takes players on a journey they can't...

A puzzle involving colliding blocks where the number pi, vey unexpectedly, shows up.

What is integration? Why is it computed as the opposite of differentiation? What is the fundamental theorem of calculus?

Figuring out exactly what consciousness is and whether or not it could emerge in non-human things has stumped us for centuries. Now, analyzing it from a scientific perspective might not just be possible, but necessary.

If you've never had a migraine, you might think it's just a really bad headache. But if you've ever had them, or you know someone who does, you know that they're much worse -- and much more complicated -- than that. Hank explains the...