On August 21, 2017, the moon's shadow raced from Oregon to South Carolina in what some consider to be the most awe-inspiring spectacle in all of nature: a total solar eclipse. umbraphile David Baron chases these rare events across the...

Sometimes our eyes do weird things. One of the things that it sometimes does is get floaters. What are they? Where do they come from? Join us today on SciShow as Hank explores the science behind these little specks.

Alexa Meade takes an innovative approach to art. Not for her a life of sketching and stretching canvases. Instead, she selects a topic and then paints it--literally. She covers everything in a scene--people, chairs, food, you name it--in...

With his signature charm and searching insight, David Whyte meditates on the frontiers of the past, present and future, sharing two poems inspired by his niece's hike along el Camino de Santiago de Compostela in Spain.

Astronomers believe that every star in the galaxy has a planet, one fifth of which might harbor life. Only we haven't seen any of them -- yet. Jeremy Kasdin and his team are looking to change that with the design and engineering of an...

We need more solutions for our energy needs, and one idea is straight out of science fiction: Solar panels, in space.

Get your eclipse glasses ready because the a total solar eclipse is an astronomical event unlike any other.

The other day I got bored and noticed this weird thing happened when I held my finger up to my eye, so I had to science it and figure it out! Let me know if you try these light-bending experiments too, especially that last one that I...

It's time for another leap second! Join SciShow as we celebrate by exploring the long and strange history of timekeeping.

Here on Earth, we’re used to seeing both lunar and solar eclipses. But further out are eclipses that don’t behave at all the way we expected them to.

Did you know there will be a lunar eclipse this week? Jessi and Squeaks explore what causes lunar eclipses and why they can make the moon look red!

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...

How can the tiny moon eclipse the sight of the gargantuan sun? By sheer coincidence, the disc of the sun is 400x larger than the disc of the moon, but the sun is 390x farther from Earth -- which means that when they align just right, the...

TOP 10 REASONS Why We Know the Earth is Round

Squeaks broke his watch! Luckily Jessi knows of a handy way to tell time, with a sundial!

The way light behaves can seem very counter intuitive, and many physicists would agree with that, but once you figure out light waves it all starts to make more sense! In this episode of Crash Course Physics, Shini shows us how we know...

Have you ever wondered why your shadow is longer sometimes and shorter others? It turns out it all has to do with that marvelous big ball of light in the sky; The Sun! This first series is based on 5th grade science. We're super excited...

Adam Savage walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed -- Eratosthenes' calculation of the Earth's circumference around 200 BC and...

The "Mountain or Valley?" illusion makes our brains turn valleys inside out. But inside-out valleys are a real thing, both on Earth and on...

February 2nd is Groundhog Day in the United States, and Jessi and Squeaks are celebrating by sharing all kinds of amazing groundhog facts with us! Learn what groundhogs eat, where they live, and how they make it through tough winters!

While flying in an airplane, if you’ve ever noticed a bright colorful ring of color around the shadow of the airplane in the clouds, then you’ve seen a Glory! Glory is the name given to concentric circles of the spectrum of color on...

Howcast - Let professional makeup artist Patricia Longo teach you how to highlight your brow bone in this eye makeup tutorial from Howcast.

Howcast - Let professional makeup artist Patricia Longo teach you how to fill in eyebrows in this eye makeup tutorial from Howcast.

Howcast - Learn how to get drag queen eyes and eyebrows in this Howcast Halloween makeup tutorial with artist Kenneth Llambelis.