Infinities come in different sizes. There's a whole tower of progressively larger "sizes of infinity". So what's the right way to describe the size of the whole tower?

One potential avenue for cancer treatment uses electricity not from any outside machine, but from within our own bodies.

In the card game SET, what is the maximum number of cards you can deal that might not contain a SET?

Today, in our final lab, Jabril tries to make an AI to settle the question once and for all, "Will a cat or a dog make us happier?" But in building this AI, Jabril will accidentally incorporate the very bias he was trying to avoid. So...

As we mentioned last episode, one of the best test spaces for building new AI systems are games. This is because games provide a great framework for an AI to learn an objective and slowly improve. In recent years, AI has made huge...

How do you defeat a creature that grows two heads for every one head you chop off? You do the math.

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

How does bitcoin work? What is a "block chain"? What problem is this system trying to solve, and how does it use the tools of cryptography to do so?

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...

The United States can create a more humane immigration system; in fact, it's been done before, says policy analyst David J. Bier. Pointing to the historical success of the US guest worker program, which allows foreign workers to legally...

What is a vector? Is it an arrow in space? A list of numbers?

A quick explanation of e^(pi i) in terms of motion and differential equations

Mandatory lockdowns, quarantines and shelter-in-place orders meant to contain COVID-19 have created a shadow pandemic of domestic abuse, says physician Kemi DaSilva-Ibru. Sharing alarming statistics on the rise of gender-based violence...

As the sun rises over a quiet coral reef, one animal breaks the morning silence. Named for its vibrant scales and beak-like teeth, the parrotfish devours a particularly crunchy breakfast: rocks. Why would any creature take bites out of...

In a rich conversation full of practical insights, former Prime Minister of Australia Julia Gillard and former Finance Minister of Nigeria Ngozi Okonjo-Iweala reflect on their experiences as women leaders in positions of global power --...

Less than 13 percent of police officers in the United States are women -- despite their proven effectiveness in diffusing violent situations and reducing the use of force. Drawing on more than two decades of experience as a police...

What exactly is a topological space?

When you think about math, what do you think of? Numbers? Equations? Patterns maybe? How about.... knots? As in, actual tangles and knots?

In a dystopian world, your resistance group is humanity's last hope. Unfortunately, you've all been captured by the tyrannical rulers and brought to the ancient coliseum for their deadly entertainment. Will you be able to solve the...

Billions of galaxies, each with billions of stars, each with .... rather a lot of particles in them. And then there's dark matter, black holes, planets, and the particles and radiation in between the stars and galaxies. But.... is the...

Foraminifera - tiny, single-celled marine life forms - build gorgeous houses that record how much ice there is on the planet.



FYI: We try to leave jargon out of our videos, but if you want to learn more about this...

Divergence, curl, and their relation to fluid flow and electromagnetism

The enigmatic equation e^{pi i} = -1 is usually explained using Taylor's formula during a calculus class. This video offers a different perspective, which involves thinking about numbers as actions, and about e^x as something which...

Roe v. Wade, the landmark 1973 Supreme Court decision protecting people's right to have an abortion in the United States, will be overturned within a year, says reproductive rights attorney Kathryn Kolbert. In this electrifying call to...