Nobody agrees on how many organs you have, or the exact criteria for a cluster of cells to be called one. But as it turns out, simply identifying a part of the body as an organ can lead to medical breakthroughs.

Scientists found that the prevailing hypothesis of how the Alzheimer’s disease starts might be wrong, and some viruses could be the culprit.

In the 1800s, Wilhelm Kühne created an image of a window from the eyes of a rabbit. Was this technology applicable to humans? Hosted by: Michael Aranda

Hank talks about how warp drives could potentially work.

Sometimes the males and females of a species can look really different from each other. This is pretty common in animals (think peacocks), but there are some plant species out there with extreme sexual dimorphism! And now scientists...

Keto was all the rage... until it wasn't. If you haven't heard of keto, welcome to the diet that promotes the consumption of ground beef, olive oil and lots of cheese... sounds like a dream, right? Maybe not. Join Michael Aranda for a...

While you might hear the name John Snow and think of dragons and unfruitful endings. There was a real life physician whose efforts saved lives and built the foundation for modern epidemiology.

The paleo diet is becoming more popular, but research suggests its claims aren’t all that scientific. Hosted by: Michael Aranda

3 billion base pairs is a pretty typical genome size for organisms like us, but there are a few plants and animals with genomes so huge they completely blow this number out of the water. Hosted by: Olivia Gordon

The cell nucleus is crucial to multicellular life, so you think science would have a good idea how it evolved. The truth is, we don't, but Scientists do have some theories, including invading giant viruses!

In the early days of the space race, agency researchers in Russia and at NASA really weren't sure all what would happen to an astronaut in space. They didn't know if a human mind could handle actually seeing Earth or what would happen to...

There are still several fascinating mysteries of our universe unsolved by scientists even after decades and even centuries of research! Join Olivia Gordon for a new episode of SciShow and learn about these seven weird phenomena that...

Cancer is a terrible disease that often ends up the subject of a lot of speculation. In this episode, we'll be debunking these 6 common myths about cancer. All of this stuff seems plausible, but these misconceptions just don't hold up....

Two new studies challenge what we thought we knew about the first humans in the Americas. Could people have been on these continents 10 to 15 thousand years earlier than archaeologists previously thought? Join Stefan Chin and learn more...

The toughest, most dominant canine gets the resources and respect - or at least that's the idea that caught on culturally. Turns out, that's not necessarily how it works.

The human genome is 3.2 billion base pairs long and contains around 20,000 genes, but how much of that is garbage? Hosted by: Hank Green

Science, while often the result of a stroke of genius, can just as easily be a stroke of extraordinarily good luck. Mendel’s work just happened to be a mix of the two.

Geologists have a few ideas as to how rain affects mountains. But could rain also help mountains grow?

Earlier this week, a team of researchers announced that they’d made a discovery about how we inherit mitochondrial DNA from our parents that could change what we know about not only disease inheritance, but human history as a whole.

Protons make up most of the regular matter int he universe, but we're still figuring out a few of their quirks... Or quarks. Join Hank Green and learn why protons are still so mysterious to scientists, and what we've discovered about...

A new strain of bird flu has been detected in North American birds for the first time in seven years. And U.S. President Biden is temporarily lifting the country's summertime ban on E15 gasoline.

Our facial expressions convey a lot about our emotions, but why? Hank explores how our evolution has helped form how we communicate with our faces. Hosted by: Hank Green

Everybody poops ... but is it possible that you're pooping all wrong? Learn the science behind the greatest debate of our time: squat vs. sit! Thanks to Patreon Patron Maia for asking this important question!

Our bodies instinctually respond to the movements and rhythms of nature, like the uplifting feeling you get when walking in a forest. Can art evoke the same emotions? Experiential artist Lonneke Gordijn takes us through her studio's...