The geographic north pole doesn't always line up with the magnetic north pole, but what do scientists know about this flipping field?

On today’s episode...CATS. Also: Hank talks about some philosophy stuff, like a few of the key concepts philosophers use when discussing belief and knowledge, such as what defines an assertion and a proposition, and that belief is a kind...

Paul Andersen discusses the specifics of phylogenetics. The evolutionary relationships of organisms are discovered through both morphological and molecular data. A specific type of phylogenetic tree, the cladogram, is also covered.

in 19th-century England, scientists were figuring out that certain parts of our brains were connected with certain parts of our bodies- but they came up with some terrible and misleading ideas that spread without rigorous scientific...

You may have heard that using baby talk is bad for children’s language development, but research seems to show the exact opposite.

Learn about the Oort Cloud with host Reid Reimers on this episode of SciShow Space!

The Italian island of Sardinia has more than six times as many centenarians as the mainland and ten times as many as North America. Why? According to psychologist Susan Pinker, it's not a sunny disposition or a low-fat, gluten-free diet...

In this video Paul Andersen explains how plate tectonics explains the large-scale system interactions on our planet. Large plates float on the mantle and interact to form the major landforms on the planet. Evidence for plate tectonics...

Paul Andersen describes genetic drift as a mechanism for evolutionary change. A population genetics simulator is used to show the importance of large population size in neutralizing random change. The near extinction of the northern...

This week, researches published a genetic analysis of the 11,500-year-old remains of a baby found in Alaska, near where the first Americans crossed the Bering land bridge. That analysis has answered some lingering questions about human...

At the beginning of the Triassic Period, with the continents locked together from pole-to-pole in the supercontinent of Pangea, the world is hot, flat, and very, very dry. But then 234 million years ago, the climate suddenly changed for...

When Homer's Iliad was first written down in the eighth century BCE, the story of the Trojan war was already an old one. From existing oral tradition, audiences knew the tales of the long siege, the duels outside the city walls, and the...

NASA's Cassini spacecraft has detected a huge ocean under the surface of Saturn's moon Enceladus. But how? And what does it really mean? Hank lays out the data -- straight from space to your brain!

Why do Africa and South America fit together? Anyone who's ever looked at a map can see that Earth's continents are kind of like a jigsaw puzzle. The idea that continents are constantly moving and weren't always in their current spots is...

These days, it seems like we're finding water all over the solar system. Still, it takes a lot more than a little H2O to support life.

It's Earth Science time!!!! In this field, natural philosophers were asking questions like, what’s up with fossils? Are they the remains of extinct organisms? Or are they so-called “sports of nature”—rocks that just happen to look like...

Paul Andersen describes pieces of evidence that Charles Darwin used to support the idea of evolution and his process of natural selection. He begins with the following evidence use in the Origin of Species; artificial selection,...

Here on SciShow, we’ve talked quite a bit about how difficult it is to predict earthquakes, and how we prepare for them. So today, let’s take a tour of earthquake science!

Around 74,000 years ago, a volcano called Toba in Sumatra exploded, and some scientists think it had a serious impact on the human population and some...don't.

Today we're going to tell the story of a quiet revolution in the 1960s that shifted our entire understanding of how the Earth works. We currently believe that the Earth's broken outer shell rises from the mantle and folds back in - kind...

We used to think having a distinct left and right brain was something unique to humans. But brain lateralization has now been found in everything from chickens to spiders! Does this change our theories for why some brains work that way?

Scientists often use the phrase “anatomically modern humans” to describe the point when our ancient ancestors looked like us. But when did humans become behaviorally modern?

Loneliness isn’t much fun, but it might also be harmful to your heart—not just in a metaphorical sense, but your actual physical heart, as well as some of your body's other functions.

In this video Paul Andersen explains how scientific theories are created and modified over time. He starts by discussing the theory of natural selection as a model for the creation and modification of theories. He gives examples of...