Forces are pushes or pulls on an object. Forces can be determined by measuring the motion of an object. If an object accelerates then a force is present.

Learn all about how sound works with Jessi and Squeaks on SciShow Kids!

Paul Andersen explains pH as the power of hydrogen. He explains how increases in the hydronium ion (or hydrogen ion) concentration can lower the pH and create acids. He also explains how the reverse is true. An analysis of a strong...

Paul Andersen explains how the central dogma of biology explains life on our planet. He starts with a brief discussion of common characteristics of all life. He then explains how DNA is used to make proteins which in turn make you. He...

Rhiannon Giddens pours the emotional weight of American history into her music. Listen as she performs traditional folk ballads -- including "Waterboy," "up Above My Head," and "Lonesome Road" by Sister Rosetta Tharp -- and one glorious...

Earth is a huge planet full of incredible sights and amazing creatures! But have you ever wondered where the Earth came from in the first place? Well, by looking at other stars and planets, scientists think they have a pretty good idea!

In this video Paul Andersen explains how metallic bonding structure creates the different properties of metals. The electron sea model explains how the positive nuclei are locked into a negative sea of delocalized electrons. This...

Jessi and Squeaks found a ton of rocks for their rock collection... but they're too heavy to get back to the fort! Join them as they figure out the perfect simple machine to help them out: the wheel and axle!

In this episode, we discuss the basic nature of gravity, one of the four fundamental forces in our universe.

Jessi and Squeaks just got a new telescope, and they can't wait to check out the night sky! But there's just one problem: it's too heavy to bring up the stairs into the observatory! Join them as they learn about a simple machine that can...

Jessi and Squeaks want to learn more about the inside of a pumpkin. How? By dissecting it!

Would you kill for a pair of Air Jordans? Lemon Andersen spins a tale of someone who did, reciting a poem by Reg E. Gaines. These verses taught Lemon that poetry could be about more than self-expression, and could sound like music when...

So, why doesn't the moon just crash into the Earth? And why doesn't the Earth crash into the Sun? What are orbits exactly and why do they happen? Well, it has to do with gravity and velocity. In this episode of Crash Course Kids, Sabrina...

Origami is helping to ease our journeys back from space, and astronomers are learning more about coronal mass ejections from a distant star!

Organisms of all shapes and sizes synchronize their behaviors using biological clocks. Some keep pace with the daily rising and setting sun using circadian rhythms. Others use annual cycles or the changing seasons as their cue. But many...

Plate Tectonics Explained

Jessi brought one of her favorite toys to the fort, a magnet! Let's see what it can stick to!

New ReviewThe coolest kite in the world!

New ReviewThe tale of the curious Elephant's Child and how it got the trunk all elephants have today.

New ReviewAnd............BOOM!

New ReviewWatch it spin through the air!

New ReviewThis video program compares mass and weight, while illustrating how these are measured. Metric units are used to measure these things using a scale or balance. The video correlates to the Next Generation Science Standard for Middle...

Winner, winner, chicken dinner!

Not at a grocery store near you!