Does your heart rate have an upper limit and could you ever reach it? Find out in this episode of SciShow. [SciShow]

Take a virtual tour of the Moon in all-new 4K resolution, thanks to data provided by NASA’s Lunar Reconnaissance Orbiter spacecraft. As the visualization moves around the near side, far side, north and south poles, we highlight interesting features, sites, and information gathered on the lunar terrain. [NASA Goddard]

You and nine other individuals have been captured by super-intelligent alien overlords. The aliens think humans look quite tasty, but their civilization forbids eating highly logical and cooperative beings. Unfortunately, they’re not sure whether you qualify, so they decide to give you all a test. Can you solve this hat riddle? Alex Gendler shows how. […]

Underneath the University of Arizona’s football stadium are the beginnings of the Giant Magellan Telescope, set to be the largest optical telescope in the world. The Richard F. Caris Mirror Laboratory is the only place equipped to manufacture gigantic 27-foot tall mirrors, the kind needed to build the heart of the Magellan. Each of the […]

A look at why bad habits are so hard to break and a few ways that will help you break them. [ASAP Science]

Modern computers are revolutionizing our lives, performing tasks unimaginable only decades ago. This was made possible by a long series of innovations, but there’s one foundational invention that almost everything else relies upon: the transistor. Gokul J. Krishnan describes what a transistor is and how this small device enables all the amazing things computers can […]

If you want to be prepared for a nuclear attack, here’s a science-based guide to help you get there. [SciShow]

Have you ever wondered how lactose-free milk is made? Youtuber NilRed did, so he made a video about it. [NileRed]

Just like the myth that plucking one gray hair will make three sprout, stress making your hair white isn’t actually a thing. Or is it?! Find out in this episode of SciShow. [SciShow]

Back in 2015 at the World Economic Forum’s Annual Meeting, Stephen Hawking gave a speech which he named “It Can Be Done.” In tribute to the passing of the man, After Skool created this white board animation that illustrates the speech. There are few scientists that can be said to have touched the public imagination. […]