Each year, we try to fight flu season with the influenza vaccine and this year is no different. But why is there a flu season at all and how do we fight it?

For the first time, researchers have observed two cases of asexual reproduction in condors. And it also turns out that whales are much hungrier than we thought.

Hank shares news about the biggest animal in the history of ever -- blue whales -- and explains the lessons learned in a new study of human morality, using smartphones.

How do we make seawater drinkable? And can that technology save California?!

In this video Paul Andersen explains how mining is used to extract valuable minerals from the Earth's crust. Surface and subsurface mining are used to extract ore which is then processed. A discussion of ecosystem impacts and...

So, what happens when there's not enough water? Well... not good things. Do we let homes have more water for showering and cooking? Or do we let farms have the water for growing crops? There aren't any easy solutions, but today Sabrina...

How can we fix water shortages? Well, we know that shortages are a problem and can cause fighting because water is a resource. When you limit a resource, things get scary. But, in this episode of Crash Course Kids, Sabrina talks about...

Hank reveals why our love affair with the rare earth elements has a dark side.

If you compare precipitation around the world with population distribution we can understand a simple but powerful pattern of human geography: where there is water, there are people. But it gets a little more complicated because where...

By the end of the 19th century, nearly 40% of American cars were electric. But these vehicles had a few major problems — early car batteries were expensive and inefficient, and the vehicles were twice the price of a gas-powered car. And...

So we've been talking about civil rights for the last few episodes now, and we're finally going to wrap this discussion up with the rather controversial topic of affirmative action. We'll explain what exactly affirmative action is, who...

There's so much water in the ocean, but why can't we drink it? Jessi and Squeaks talk about the difference between ocean water and the water you drink at home.

People around the world are demanding clean air -- and cities are starting to respond, says electrification advocate Monica Araya. She takes us on a world tour of urban areas that are working to fully electrify their transportation...

Social media has become our new home. Can we build it better? Taking design cues from urban planners and social scientists, technologist Eli Pariser shows how the problems we're encountering on digital platforms aren't all that new --...

What happens to a single ecosystem when the amount of freshwater available in it changes? Not really much good. In this episode of Crash Course Kids, Sabrina talks about ecosystems and how one small change can lead to a cascade effect in...

A judge in California recently ruled that coffee would be required to carry a carcinogen warning label, since it contains acrylamide. Well, have the barista make you a double espresso with a shot of evidence, because that coffee probably...

Synthesizing multiple sources in a crucial part of any research project. It's the step where we take information from all of our sources and combine it together into a single project or paper. In this video, we'll explain how to analyze...

Mexico is one of the most populous countries in the world. At four times the size of Spain, it’s one of the largest. Geographically, it’s also one of the most diverse countries. It includes nearly every geological formation found in the...

For decades, people have reported seeing something strange in the woods—tall, shadowy figures with long hair and huge footprints. Are they hoaxes, misidentifications, or proof of a real creature? In this episode, we count down five of...

As Trump begins his presidency, this a data-driven look at how the American people view the world, including what they think are major threats.

By nearly every metric, Donald Trump's vision is wrong, the United States of America is already great. This data-driven analysis shows why.

Ten infrastructure mega-projects America needs President Donald Trump and congress to fund and build in the near future.

America's ten most (and least) religious states, compared.

An examination of President Barack Obama's achievements over his two terms in office.