A look at what turbulence is (in fluid flow), and a result by Kolmogorov regarding the energy cascade of turbulence.

If you've ever wondered why you crave certain foods or what your appendix actually does, there's something in this collection for you!

An overview of what calculus is all about, with an emphasis on making it seem like something students could discover for themselves. The central example is that of rediscovering the formula for a circle's area, and how this is an...

When you have a study with a small sample size, how do you know that the results represent the broader population? Well, thanks to a brewer who needed to assess beer quality in the early 1900s, we now have a simple statistical test that...

A look at what turbulence is (in fluid flow), and a result by Kolmogorov regarding the energy cascade of turbulence.

A visual for derivatives which generalizes more nicely to topics beyond calculus. Thinking of a function as a transformation, the derivative measure how much that function locally stretches or squishes a given region.

Scientists are working on creating organisms with designer genomes -- and someday, we might end up with bacteria manufacturing our jet fuel.

Hank squares off against the host of SciShow Kids, Jessi Knudsen Castaneda, to match wits about chemistry, evolution, and how babies are weird!

HEPA filters are the basis of modern filtration - but they also represent a straight line from the Manhattan Project to your living room!

Nearly 1,800 newsrooms have shuttered across the US since 2004, leaving many communities unseen, unheard and in the dark. In this passionate talk and rallying cry, journalist Chuck Plunkett explains why he rebelled against his employer...

We need to eat food to fuel our bodies, but this special slug, called emerald elysia, can make food using sunlight - just like plants do!



All organisms have external parts. Different animals use their body parts in...

Learn all about teeth! What kinds we have, how they help us, and how human teeth are different from other animals!

Earth has its share of monster storms, but even our most powerful hurricanes are a breeze compared to the great, planet-sized tempests of the gas giants.

Blu-rays can hold about ten times more than DVDs because Blu-ray players use special blue lasers to read them. But it took a while for scientists to figure out how to make those lasers work.

Sometimes the males and females of a species can look really different from each other. This is pretty common in animals (think peacocks), but there are some plant species out there with extreme sexual dimorphism! And now scientists...

Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system....

You're about to throw a party with a thousand bottles of wine, but you just discovered that one bottle is poisoned! Can you determine exactly which one it is?

How to See Without Glasses

Jessi and Squeaks learn all about crystallization while they make some yummy rock candy!



Second Grade Next Generation Science

Standards

Disc

iplinary Core Ideas:

PS1.A: Structure and Properties...

Meet the Duke of Burgundy, a species of butterfly that was saved from certain doom, thanks to a bridge.

Robert Lang is a pioneer of the newest kind of origami -- using math and engineering principles to fold mind-blowingly intricate designs that are beautiful and, sometimes, very useful.

What is the derivative of a^x? Why is e^x its own derivative? This video shows how to think about the rule for differentiating exponential functions.

We used to believe that our ancestors had clear roles: Men hunt, women gather. But new evidence suggests that some of the earliest big game hunters were women.

Guns in Space