It has NO EDGE. And NO CENTER... or does it?

How Big Is The Sun?

This video is about the orbital mechanics of why it's so hard to crash into the sun - the energy it takes to get there is astoundingly high, compared with leaving the solar system.

Neil deGrasse Tyson was asked by the Templeton Foundation to answer the question "Does the Universe Have a Purpose". Then he read his answer aloud and I drew some pictures for it.

This video is about the famous 'Twins paradox' of special relativity, how time can appear to be faster for two different observers at the same time, and which twin really is older (or younger) - the one who stays on earth or the one who...

What if you thought the earth was flat? And then you found out it isn't?

This video is about the differences between the corpses or final degenerate dense star forms that dead stars take: black holes, neutron stars, and white dwarfs. The main distinguishing features between them are the mass cutoffs...

Why is it Hot Underground

Why Does Earth Have Deserts? For the same reason it has Rainforests: Hadley Cells!!!

Still wondering why leaves are green and not purple or even black? CHLOROPHYLL! It's how leaves work.

Have you ever wondered why leaves are green and not red, blue, or even black? We did too!

Which Bear Is Best?

Plate Tectonics Explained

In this captivating video narrated by astrophysicist Neil deGrasse Tyson, viewers are taken on a journey through the history of the universe, from its explosive beginnings to the evolution of life on Earth. Through a mix of science and...

Evolution vs Natural Selection

How To Go To Space (with XKCD!)

How To Detect A Secret Nuclear Test

Guns in Space

Want to learn more about the topic in this week's video? Here are some key words/phrases to get your googling started: - Lifting Condensation Level (LCL): The altitude at which the water vapor in rising air begins to condense - Adiabatic...

Today's oceans are full of fish with fins that couldn't evolve into limbs like ours. So, who are our ancestors and where did they go?

In the past decade, astronomers have discovered interstellar objects, including a 2014 meteor that collided with Earth and 'Oumuamua in 2017. These objects, moving too fast to be bound by the Sun's gravity, have sparked questions about...

Astrophysicist Avi Loeb believes we are likely not alone in the universe. He criticizes the approach of simply waiting for contact through radio signals, suggesting instead that we should actively search for evidence of other life. He...

If you think it's cold outside where you are, you should try living in the coldest place on Earth: Antarctica! Learn why it's a desert even though it's very cold, and about awesome animals like seals and penguins.

Mastodons and woolly mammoths were both ancient relatives of elephants, but they were very different! Join Jessi and Squeaks to see how we can learn all about what an ancient animal ate, just by looking at its teeth.