We've talked about variables and solving problems. But how do we keep working on a problem if the first solution doesn't fix it? Trials! In this episode of Crash Course Kids, Sabrina shows us how to use Trials to figure out what the...

In this glimpse into our technological future, cryptographer Craig Costello discusses the world-altering potential of quantum computers, which could shatter the limits set by today's machines -- and give code breakers a master key to the...

So far in this series, we've mostly focused on how AI can interpret images, but one of the most common ways we interact with computers is through language - we type questions into search engines, use our smart assistants like Siri and...

Hank lays out three of the most awesome discoveries in science in 2013, from the fields of physics, space science and anthropology.

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...

In this video Paul Andersen explains how contour lines show areas of equal elevation or equal gravitational potential. Contour lines are used as an analogy for lines of equipotential in electric fields.

This video is about two-photon (gamma-gamma) physics, and how photons can interact with each other - either mediated by a passing lepton, or gravitationally via lensing, or via vacuum fluctuation pair production of vertical particles...

If you want to make atoms THIS cold, you can’t just stick them in the freezer…you’ll need to take advantage of quantum mechanics!

The way modern researchers study the sky hasn’t really changed in the last few centuries. For the most part, astronomers still study things by analyzing their light.

Has a fifth fundamental force been discovered and how will this effect our understanding of the universe?

We can now map the interiors of stars by "listening" to their harmonies as they vibrate with seismic waves.

Dr. Shini Somara joins us on the Talk Show today to talk Crash Course Physics and her background in fluid dynamics and television. Then Jessi from Animal Wonders brings on Sydney, their Brush-tailed Bettong.

Obviously most telescopes need to see the sky to do their job, but when you are studying a wave that can pass right through the earth, the best place for your telescope might be underground.

Roboticist Auke Ijspeert designs biorobots, machines modeled after real animals that are capable of handling complex terrain and would appear at home in the pages of a sci-fi novel. The process of creating these robots leads to better...

In this video Paul Andersen explains how object interactions can add or remove mass or energy from a system.

Hank gives us the specifics on the "discovery" of the elusive Higgs boson. It is, at the very least, a victory for the scientific method!

It's really difficult for life to create blue pigments, but the color can appear in a handful of compounds that create just the right conditions to reflect blue photons.

Energy is the most powerful and useful concept in all of physics, but what exactly is it?

This video is about why it's harder to successfully land spacecraft and landers and rovers on Mars than on Earth, or Venus, or the Moon, or Titan, or asteroids. It all comes down to atmospheric density! When there's no atmosphere, you...

While astronomers are busy searching for life beyond Earth, they’ve also started asking another question: If life seems so difficult to find, then why is our world so full of it? One answer might be overhead right now: the Moon!

According to the cosmological principle, the universe is more or less the same in all directions. But what happens when we put this to the test?

Why does the universe seem to be moving in one particular direction?

The snow is really coming down where Jessi lives, so she and Squeaks decided to stay indoors where it's nice and warm and look back on some of the amazing things they've learned about winter! Grab a fuzzy sweater and a mug of cocoa and...

Stripes! Hexagons! They're everywhere! These patterns in nature might seem like aesthetic coincidences, but they are actually the result of physical process that show up again and again, even in otherwise unrelated phenomena.