Jessi and Squeaks love to build things, and they love to learn how to make the things they build even better! Join them today to learn how engineering can help make anything, from a tower of cups to a giant sky scraper, more stable!

Planetary alignments: They're the favorite astronomical scenario of kooks, con artists, and Hollywood producers everywhere. But has it ever happened? And what would it do to Earth if it did?

Paul Andersen details the evolutionary processes of speciation and extinction. Stickleback evolution in Lake Loberg is used as example of rapid speciation. Adaptive radiation is illustrated using the Hawaiian honeycreeper. A brief...

A silly poem encapsulating the ideas from the video about Euler's formula through graph theory.

In this video Paul Andersen begins by discriminating between translation and rotational motion. He then explains how a torque is the product of the lever arm and the force perpendicular. The lever arm must be perpendicular to the axis...

Have you ever tried to write or color with both hands at the same time? It seems like it would save a ton of time, right? But for most people, one of their hands is way better at drawing or writing than the other!

What's the deal with that sharp pain in your side when you're trying to win that marathon? SciShow has the answers!

In this episode we explain what quantum tunneling is and how it works!

Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.

This video is about a multistable perceptual illusion, similar to the hollow face illusion, whereby maps or aerial or satellite photos look upside down/inside out, ie, concave (valley) parts look convex and convex...

Why do we have to choose between nationalism and globalism, between loving our countries and caring for the world? In a talk with lessons for avowed nationalists and globalists alike, Wanis Kabbaj explains how we can challenge this...

In this video Paul Andersen discusses the technology, advantages and disadvantages of six sources of renewable energy; biomass, hydroelectric, solar, geothermal wind, and hydrogen. He also explains how changes in the storage and flow of...

Is it a bird? A plane? A supernova? No! It turned out to be something else! We've also now studied the weather on a gas giant exoplanet!

Conventional wisdom might have you believe that human beings only really start showing empathy after a few years of learning social norms and morals. However, some research suggests that this kind of compulsion to do good might be...

In 1978, Diane Hartley was writing her undergraduate architecture thesis when she made a shocking discovery. After weeks of poring over the Citicorp Center's building plans, she'd stumbled on an oversight that threatened to topple the...

There’s a huge seasonal difference in death rates that is propelled by a variety of factors including pathogen behavior and anatomical response to temperature changes.

Paul Andersen explains how plants use hormones to respond to their environment. The following hormones are detailed; auxin, cytokinins, gibberelins, abscisic acid and ethylene.

Improving batteries is a tough problem, but it’s also an important one because in many ways the future of our planet also depends on the future of batteries. Luckily, scientists are on the case, figuring out ways to give this essential...

What drives society's understanding of right and wrong? In this thought-provoking talk, futurist Juan Enriquez offers a historical outlook on what humanity once deemed acceptable -- from human sacrifice and public executions to slavery...

In sub-Saharan Africa, HIV infections are more prevalent and doctors scarcer than anywhere else in the world. With a lack of medical professionals, Mitchell Besser enlisted the help of his patients to create mothers2mothers -- an...

We'd like to know why you're staring at yourself in a spoon in the first place. But we can at least answer the question of why you look upside-down when you do.

Euclid of Alexandria revolutionized the way that mathematics is written, presented or thought about, and introduced the concept of mathematical proofs. Discover what it takes to move from a loose theory or idea to a universally...

The sun also causes tides on the earth, but they're only about half as strong as the moon's. When the sun & moon line up during full & new moons, tides are extra big.

Around 750-1250 CE, the Islamic empire made incredible scientific advancements that still influence many fields of research today. What we know about some of the great minds of that time, as well as what we’ve learned from modern...