Most mammals can develop bones in their hearts. For humans, it's usually a bad thing, but for river otters, it could be a useful adaptation.

What should modern leadership look like? Entrepreneur and former Icelandic presidential candidate Halla Tómasdóttir thinks global leaders need to change their ways -- or risk becoming irrelevant. In a conversation with curator Bryn...

Paul Andersen explains how to formulate questions to guide discussions and investigations. He starts by describing the proper type of questions that should be asked in an AP Biology classroom. He gives four examples of questions that...

Today's math curriculum is teaching students to expect -- and excel at -- paint-by-numbers classwork, robbing kids of a skill more important than solving problems: formulating them. Dan Meyer shows classroom-tested math exercises that...

Paul Andersen explains how investigations are used by scientists to answer questions and by engineers to test designs. He delineates be investigative and observational science. He demonstrates the formation of a good question the...

Spray-painted subway cars, tagged bridges, mural-covered walls -- graffiti pops up boldly throughout our cities. And it turns out: it's nothing new. Graffiti has been around for thousands of years. And across that span of time, it's...

Physicist Brian Greene explains superstring theory, the idea that minscule strands of energy vibrating in 11 dimensions create every particle and force in the universe.

Today we start our unit on language with a discussion of meaning and how we assign and understand meaning. We’ll cover sense and reference, beetles in boxes, and language games. We’re also getting into the meaning-making game ourselves:...

In this video Paul Andersen explains how a system can be viewed as an object and an object can be viewed as a system.

You might consider yourself a visual learner, but is there really a way to categorize different types of students?

From rockets to stock markets, many of humanity's most thrilling creations are powered by math. So why do kids lose interest in it? Conrad Wolfram says the part of math we teach -- calculation by hand -- isn't just tedious, it's mostly...

BJ Kirschhoffer from Polar Bears International discusses polar bear behavior and Jessi from Animal Wonders brings on an animal that lives near polar bears, an arctic fox!

Contraception. The topic has become controversial in recent years. But should it be? Melinda Gates believes that many of the world's social change issues depend on ensuring that women are able to control their rate of having kids. In...

Plants! We absolutely depend on them. Oxygen, food, and looking super nice to boot! But, plants have a lot more going on than meets the eye. How do we know that? Investigations and Experimentations!

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...

At one time, Wolverine served on four different superhero teams. How did he do it? He may have used graph coloring.

Hank brings you the SciShow news of the week. Recent record high temperatures and other extreme weather events around the world are climate change in action; a new fossil of an ancient human ancestor; some disturbing discoveries about...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. What do Tourette syndrome, heroin addiction and social media obsession all have in common? They converge in an area...

Reading and writing can be acts of courage that bring us closer to others and ourselves. Author Michelle Kuo shares how teaching reading skills to her students in the Mississippi Delta revealed the bridging power of the written word --...

Hank squares off against the host of SciShow Kids, Jessi Knudsen Castaneda, to match wits about chemistry, evolution, and how babies are weird!

How does a robin know to fly south? The answer might be weirder than you think: Quantum physics may be involved. Jim Al-Khalili rounds up the extremely new, extremely strange world of quantum biology, where something Einstein once called...

T. Morgan Dixon and Vanessa Garrison, founders of the health nonprofit GirlTrek, are on a mission to reduce the leading causes of preventable death among Black women -- and build communities in the process. How? By getting one million...

A geometry/probability question on the Putnam, a famously hard test, about a random tetrahedron in a sphere. This offers an opportunity not just for a lesson about the problem, but about problem-solving tactics in general.

Even science can't yet explain these 7 extremely cool, weird phenomena in the universe, despite decades or even centuries of research.

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