Hank describes to us some news stories that illustrate how science is continually changing the things we think we "know" - from the status of various animals species, to the way our senses work and even where the Moon came from -...

Meet the friendly robot that could deliver your next burrito. Ali Kashani introduces us to Postmates' autonomous delivery robot and explains how it could help reduce carbon emissions and free up valuable real estate in cities everywhere....

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Anthropologist Wade Davis muses on the worldwide web of belief and ritual that makes us human. He shares...

In this video Paul Andersen shows you how a cross between mutant and wild types of Sordaria fimicola can be used to show and measure frequency of crossing-over. He begins by reviewing the process of meiosis in a typical organism. He...

An Impossible Bet

If you can find a phone book these days, science is here to help you rip it in half with your bare hands!

Professor Fukan_, the famous scientist, has embarked on a new challenge - piloting around the world in a plane of his own design. There's just one problem: there's not enough fuel to complete the journey. Luckily, there are two other...

Using the harmonic series we can build an infinitely long bridge. It takes a very long time though. A faster method was discovered in 2009.

When you hear the word, "Work," what is the first thing you think of? Maybe sitting at a desk? Maybe plowing a field? Maybe working out? Work is a word that has a little bit of a different meaning in Physics and today, Shini is going to...

Written language, the hallmark of human civilization, didn't just suddenly appear one day. Thousands of years before the first fully developed writing systems, our ancestors scrawled geometric signs across the walls of the caves they...

Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies.

The average global temperature is on the rise, evidenced by the ten warmest years on record happening since 2005. But this isn’t just about greenhouse gases preventing heat from escaping. Another culprit comes in the form of…clouds.

The US economy has been expanding wildly for two centuries. Are we witnessing the end of growth? Economist Robert Gordon lays out 4 reasons US growth may be slowing, detailing factors like epidemic debt and growing inequality, which...

Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically...

You might think venomous snakes or fierce lions are the best hunters, but turns out they are not even close to these 6 actual best hunters in the animal kingdom.

Feathers are good for flying, but they help birds do a lot more than just soar through the skies.

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When a piece of cryptography is described as having "256-bit security", what exactly does that mean? Just how big is the number 2^256?

The Chinese internet has grown at a staggering pace -- it now has more users than the combined populations of the US, UK, Russia, Germany, France and Canada. Even with its imperfections, the lives of once-forgotten populations have been...

We all know the arguments that being vegetarian is better for the environment and for the animals -- but in a carnivorous culture, it can be hard to make the change. Graham Hill has a powerful, pragmatic suggestion: Be a weekday veg.

Rice production needs to see a 50% increase by 2030 to keep up with population growth, but as the climate warms, rice plants will likely become less efficient. Fortunately, scientists are working on a pretty clever potential solution.

When Lesley Hazleton was writing a biography of Muhammad, she was struck by something: The night he received the revelation of the Koran, according to early accounts, his first reaction was doubt, awe, even fear. And yet this experience...

Can folding a piece of paper 45 times get you to the moon? By seeing what happens when folding just one piece of paper, we see the unbelievable potential of exponential growth. This lesson will leave you wanting to grab a piece of paper...

In this video Paul Andersen explains how the structure of the nucleus influences the properties of the atom. The number of the protons determines the kind of element. Isotopes are formed when the number of protons remain the same but...

Carbon dating is a lot more than just getting the age of a dinosaur bone. We can learn a lot about the world through its use, and it turns out, we have.