What does it mean to be a “semi-aquatic” dinosaur? Was it wading in the shallows, or could it have been a skilled swimmer? Each scenario paints a very different picture of Spinosaurus, and the discovery of new fossils has paleontologists...

Life’s been around on Earth for at least 3.7 billion years. But for most of that time, it was incredibly boring — just simple little cells squirming around in water. It only got interesting in the last few hundred million years. And that...

When people picture New York City they see skyscrapers, subways, and a concrete jungle. But the Big Apple is really a seaside city built on an archipelago. In the wake of a century of industrial pollution and climate change-fueled...

Imagine the scale of raindrops if you were the size of a small bird. Or mosquito. Flying through a drizzle should be deadly! Like flying through falling cars and boulders. And yet it’s not, because nature has given them a...

The oldest rocks on Earth are more than just ancient—they’re time machines, holding clues to Earth’s missing history and revealing what happened in the unknown times after the Big Bang. We’ll work with our Adam and Joss from Howtown to...

Despite what you may have heard or learned in school, the sun is NOT in fact the center of the solar system. And it won’t be until 2027… But this being a science channel, you might be thinking “What the heck is this guy talking about? Of...

In this menstrual cycle video, explore the ovarian cycle and uterine cycle with the Amoeba Sisters! This video will walk through major events in phases of the ovarian cycle (follicular phase and luteal phase) and phases of the uterine...

Join the Amoeba Sisters as they introduce the basics about cladograms and phylogenetic trees. The Amoeba Sisters walk through the process of building a basic cladogram and mention vocabulary such as: shared ancestral character, shared...

Join the Amoeba Sisters as they introduce angiosperms (flowering plants) before exploring flower parts, pollination, and double fertilization in angiosperms! This video also talks about the importance of pollinators.

Join the Amoeba Sisters as they explore the action potential. This video discusses resting membrane potential before going into the phases of the action potential including vocabulary such as depolarization, repolarization, and...

India's Roopkund Lake, also known as Skeleton Lake, is the site of gruesome sculptures of human bones. Many causes of these deaths have been proposed, from hail to divine intervention. But scientists now think that whatever happened, it...

It's a hard world out there, especially for a little guy. So what's a soft-bodied animal to do? Turns out that marine invertebrates basically figured out the best defense system of all time, and nobody's a better demonstration of that...

So you've probably heard by now that a biotech company called Colossal Biosciences has brought dire wolves back form extinction. Or at least.... they SAY they did. We wanted to break down all the science in their claims, and get to the...

Are you an insect fetus who'd rather not get eaten by your siblings? How about a baby frog who'd rather not drown before getting to leave your egg? Well, you had better figure out a way to hatch when you need to. Hosted by: Hank Green

The number of people with Parkinson's Disease has doubled in just 25 years, but its rise has been much worse in some places than in others. Hosted by: Stefan Chin (he/him)

A huge number of vehicular fatalities are people who aren't in cars at all. Pedestrians are dying more than they used to and more in America than other comparable parts of the world. Here's why. Hosted by: Savannah Geary (they/them)

Silfra Fissue in Iceland is a remarkable place where the Earth is tearing itself apart. Here, intrepid divers can reach out and touch two continents at once. But... should they? Hosted by: Reid Reimers (he/him)

Correction: This episode has some mistakes in our on-screen credits. The Writer is Tom Rivlin, the script Script Editor is JD Voyek, and the Fact Checker is Angela Reed. Have you ever listened to someone speaking a foreign language and...

There are a lot of great debates in science, and a major one is when exactly humans reached the Americas. There's contentious footprints and wishy-washy stone tools, all of which has spurred some heated academic arguments. But the most...

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 standing. Hosted by:...

Are you old enough for your childhood to be filled with the threat of acid rain? Are you now thinking "Wait, why haven't I heard about the threat of acid rain in forever?". Well it's because scientists and policymakers around the world...

Does eating soy make you more feminine? Is sunscreen actually bad for you? (No.) Here are five bad takes about human health, and the real truth behind them. Hosted by: Stefan Chin (he/him)

Plant-based meat alternatives have come a long way, but scientists continue to look for sources of protein that will improve on them. Here are five of the most promising plants being researched. Hosted by: Stefan Chin (he/him)

Reforesting unneeded farmland could be a huge key for getting the climate crisis under control. Which is why Pat Brown, creator of the Impossible Burger, is trying to figure out the best way to do it. Hosted by: Stefan Chin (he/him)