Tag «John Green»

When the Rainforests Collapsed

When the Rainforests Collapsed

Way back, about 310 million years ago, a lizard-like creature took shelter in a hollow stump in what’s now Nova Scotia. It was small, not much bigger than your hand, and it hunted for insects in an ecosystem that was way different from anything you’ll find in Canada today. It lived in a warm, swampy …

Harun al-Rashid | The Golden Prime | 766CE – 809CE

Harun al-Rashid | The Golden Prime | 766CE – 809CE

Harun al-Rashid is, without a doubt, the most famous caliph. Even those who don’t know anything about Islamic history know the name of Harun al-Rashid. Most of what we think we know about him comes more from exotic imagination and the Arabian Nights than from actual history. Whenever someone talks about a good leader in …

Crash Course Big History #5: The Evolutionary Epic

Crash Course Big History #5: The Evolutionary Epic

Hi, I’m John Green. Welcome to Crash Course Big History. Today we’re going to be traversing the evolutionary epic– the great story of magnificent beasts, terrifying predators, quite a lot of extinctions, and countless varieties of evolutionary forms. It’s the ultimate epic– millions upon millions of species playing out a drama that has so far …

The Enlightenment: Crash Course European History #18

The Enlightenment: Crash Course European History #18

Hi I’m John Green and this is Crash Course European History. So far, we’ve seen a ton of political change and continuing warfare in the midst of the seventeenth century’s little ice age, and history often focuses on these types of political and military stories, but there were also other changes occurring: shifts in how …

The Mind/Brain: Crash Course History of Science #30

The Mind/Brain: Crash Course History of Science #30

Scientists in the nineteenth century discovered a lot about life and matter. But exactly what kind of stuff is the human brain? That one was—and remains—tricky. The brain sciences—with experiments and therapies tied to biological theories of the body—emerged in the nineteenth century and came into their own in the early twentieth. I’m Hank Green …

Biomedicine: Crash Course History of Science #34

Biomedicine: Crash Course History of Science #34

Who’s ready for more World War Two science? No? No one? Well, this story is about all kinds of badness, yes—but also a lot of incredible goodness. The history of science up until the Cold War is often overshadowed by the Manhattan Project. But today we are going to talk about advances in biomedicine, or …