Mr. Andersen gives a brief description of matter. The five states of matter are also discussed.

Jessi and Squeaks are ready to go outside, but before they do, Jessi needs to make sure to put on sunscreen so that she doesn't get a sunburn!

We’ve gotten maybe too good at fishing, and as a result we’ve completely transformed the oceans. So what can we do to make fishing more sustainable and still enjoy our fish and chips?

Viruses all around us, they evolve, grow, and can be killed. But are they alive?

You've probably heard the word "Entrepreneur" thrown around a lot in business. It conjures images of Elon Musk, Bill Gates, or Oprah Winfrey. But, it goes way beyond that. In this episode of Crash Course Business: Entrepreneurship, Anna...

In which John Green teaches you how Russia evolved from a loose amalgamation of medieval principalities known as the Kievan Rus into the thriving democracy we know today. As you can imagine, there were a few bumps along the road. It...

The basic idea of human rights is that each one of us, no matter who we are or where we are born, is entitled to the same basic rights and freedoms. That may sound straightforward enough, but it gets incredibly complicated as soon as...

In which John Green teaches you about one of the least funny subjects in history: slavery. John investigates when and where slavery originated, how it changed over the centuries, and how Europeans and colonists in the Americas arrived...

In this video Paul Andersen explains how various techniques have been used for years to collect seafood. Commercial fishing has led to overfishing in certain areas and species due to the tragedy of the commons. An explanation of...

Bill and Webb can’t seem to agree, so they head the The Fort where Mister Brown tries to help them work together by teaching them about mutualisms, or when different types of animals help each other in the wild!



Next...

Paul Andersen describes how life could have formed on our planet through natural processes. The progression from monomers, to polymers, to protocells and finally to cells is described. The Miller-Urey experiment is described in detail...

Everyone is familiar with Twitter, the uber-popular micro-blogging site, which limits the user to 140 characters. The tweet is perfect for sharing your favorite links and updating the world about your life, but it might also be the...

In which you are introduced to the life and accomplishments of Alexander the Great, his empire, his horse Bucephalus, the empires that came after him, and the idea of Greatness. Is greatness a question of accomplishment, of impact, or...

Transhumanism is a scientific philosophy that says technology will solve all our human biological constraints and that immortality is right around the corner (well not RIGHT around the corner, but WAYYY closer). They envision a world of...

In which John Green explores exactly when Rome went from being the Roman Republic to the Roman Empire. Here's a hint: it had something to do with Julius Caesar, but maybe less than you think. Find out how Caesar came to rule the empire,...

As engineer, sometimes lives will be in your hands, so this week we’re exploring safety and its impact on engineering. We’ll discuss the difference between occupational safety and public safety and how to analyze and review a process for...

Hank wraps up the Crash Course on ecology by taking a look at the growing fields of conservation biology and restoration ecology, which use all the kung fu moves we've learned about in the past eleven weeks and apply them to protecting...

Why do Africa and South America fit together? Anyone who's ever looked at a map can see that Earth's continents are kind of like a jigsaw puzzle. The idea that continents are constantly moving and weren't always in their current spots is...

Whether or not it's worth investing in, the math behind Bitcoin is an elegant solution to some complex problems.

We've learned before here on SciShow Kids how boats can float on water using displacement! Today, Bill and Webb will show you how to build you own boat and see displacement in action! Anchors aweigh!

Squeaks and Mister Brown are so excited about rockets, they're going to make their own! You can join in on the fun and learn how to make one too!

Feeling like the world is becoming less friendly? Social theorist Jonathan Zittrain begs to differ. The Internet, he suggests, is made up of millions of disinterested acts of kindness, curiosity and trust.

Cheyenne Cochrane explores the role that hair texture has played in the history of being black in America -- from the heat straightening products of the post-Civil War era to the thousands of women today who have decided to stop chasing...

Well, it wouldn't be too long after we started developing Ecology that we would try to control the environment. In some ways this was helpful and likely prevented a lot of people from starving. But, there have been a few downsides.