Biology is the study of life—a four-letter word that connects you to 4 billion years worth of family tree. The word “life” can be tricky to define, but a shared set of... Read more »
Humans love to play with their food—in fact, we’ve been doing it for thousands of years. In this episode of Crash Course Botany, we’ll explore how we’ve learned to manipulate plant genetics,... Read more »
Plants have got you surrounded. They’re in your toothpaste, your bedsheets, and your regular Taco Bell order. In this episode of Crash Course Botany, we’ll find out what botanists study and how... Read more »
In today’s Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of... Read more »
Climate change has no bias, but our societies and systems do. And although it’s a danger to all of us, a changing climate affects some groups disproportionately, raising issues of justice and... Read more »
Hank explains speciation – the evolutionary process by which new biological species arise – in terms of finches, ligers, mules, and dogs. Table of Contents 1) Species 0:30 2) Hybrids 1:52 3)... Read more »
In which John Green teaches you, at long last, about the most exceptional bunch of empire-building nomads in the history of the world, the Mongols! How did the Mongols go from being... Read more »
In which Adriene Hill and Jacob Clifford teach you about specialization and trade, and how countries decide whether they’re going to make stuff or trade for stuff. You’ll learn about things like... Read more »
Humans have come up with some clever ways of keeping cool when it’s warm, and staying warm when it’s cool. But unfortunately, our heating and air conditioning systems are worsening the climate... Read more »
Not sleeping for days on end. Long periods of euphoria. Racing thoughts. Grandiose ideas. Mania. Depression. All of these are symptoms of Bipolar Disorder. In this episode of Crash Course Psychology, Hank... Read more »