Did you ever wonder how some squirrels find food in the cold winter? Mister Brown and Squeaks learn all about it this week as they discover a squirrel midden on their hike!

Jessi and Sam the Bat team up to answer your questions about space, like: How was the universe created?

If you were looking down at the Earth from space, what would you be able to see? Do you think you would be able to see your house? What if you were super far away?

Rejection hurts. It's incredibly painful to feel like you're not wanted — and we do mean painful. Researchers found that we relate rejection to being "hurt," using terms like "crushed" or "broken-hearted." So, why does rejection trigger...

What do we say to kids when intensely traumatic events interrupt everyday life? Whether you're a teacher, parent or community builder, educator Kristen Nguyen provides three research-backed steps for navigating these difficult...

Our memories and bodies give us clues about who we are, but what happens when this guidance shifts? In this mind-bending talk, science writer Anil Ananthaswamy shares how the experiences of "altered selves" -- resulting from...

What does inclusive leadership look like? Artist and TED Fellow Constance Hockaday shares how the captain of a trans-Atlantic community raft taught her how to voice her hopes and desires, inspiring a vision of possibility for the future....

Mosquitoes are responsible for more human deaths every year than any other animal, but very few of the 3,500 mosquito species actually transmit deadly diseases to humans. Scientists have been conducting experiments using engineered...

After a week of studying, you feel confident that you'll ace your exam. But when you get your grade back, it's much lower than you expected. You're devastated, and the disappointment is hard to shake. Should you be trying to look on the...

An introduction to group theory, and the monster group.

In this video Paul Andersen explains the differences between a system and an object. Depending on the scale it often times easies to view a system as an object if the constituent parts aren't relevant to the question being asked. He...

In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first he has to tell you what the West is. And then he has to explain the Rise of...

Derivatives are about slope, and integration is about area. These ideas seem completely different, so why are they inverses?

Sebastian Wernicke thinks every TED Talk can be summarized in six words. In this talk, he shows how to do just that -- and less.

A solution to the puzzle involving two blocks, sliding fricionlessly, where the number of collisions mysteriously computes pi

Paul Andersen teams up with Keith Hughes to explain why teaching evolution is not optional for high school biology teachers.

In this video Paul Andersen explains how scientists analyze data and evaluate evidence. He starts with a description of data and how it must be properly displayed. He then describes types of data in each of the four big ideas. He...

A solution to the puzzle involving two blocks, sliding fricionlessly, where the number of collisions mysteriously computes pi

A solution to the puzzle involving two blocks, sliding fricionlessly, where the number of collisions mysteriously computes pi

We reference the DSM pretty frequently on SciShow Psych, and for good reason: it’s considered the gold standard for professional mental health diagnosis in the United States, but it was an interesting journey to get there.

The lower half of Mr. Andersen's head explains why cells are small. This video begins with a simple geometry problem and ends with a discussion of Allen's Rule and reasoning for the microscopic nature of cells.

Derivatives are about slope, and integration is about area. These ideas seem completely different, so why are they inverses?

Now that we’ve started talking about identity, today Hank tackles the question of personhood. Philosophers have tried to assess what constitutes personhood with a variety of different criteria, including genetic, cognitive, social,...

The origin of life is one of the most important mysteries in all of science. When did life begin? How did life first evolve from chemistry? Where did life get started? In some primordial soup or somewhere else? Let's journey back to the...