How Did Humans Evolve? Crash Course Biology #19

From Crash Course. What’s a human? And how did we become humans, anyway? In this episode of Crash Course Biology, we’ll meet some of our closest relatives and trace how we evolved into the brainy, inventive, complex species we are today. Chapters: The First Humans 00:00 What is a Human? 1:18 Hominins 2:31 Dr. Xinzhi…

Humans Develop Butt First (and other insights from the Tree of Life): Crash Course Biology #18

From Crash Course. Everywhere you look on Earth, you’ll find wonderful and diverse living things, from tiny tardigrades to soaring sequoias. And incredibly, everything alive today, and everything that’s ever lived, is related. In this episode of Crash Course Biology, we reveal how the evolutionary relationships between living things define their place on a single,…

How We’re All Related (Phylogeny): Crash Course Biology #17

From Crash Course. Crocodiles, and birds, and dinosaurs—oh my! While classifying organisms is nothing new, phylogeny— or, grouping organisms by their evolutionary relationships—is helping us see life in a whole new light. In this episode of Crash Course Biology, we’ll learn why this kingdom-phylum stuff is going out of style and why phylogenetic trees are…

The Future of Botany: Crash Course Botany #15

From Crash Course. We’ve learned a lot about plants throughout this series, but there’s much more to discover. In this episode of Crash Course Botany, we’ll peek into the future of botany. We’ll consider current plant mysteries, bridges between Western science and traditional knowledge, and what it might take to garden on the moon. Chapters:…

The Effects of Climate Change: Crash Course Biology #9

From Crash Course. Climate change shakes up all of Earth’s systems, including the living ones. In this episode of Crash Course Biology, we’ll see how climate change’s effects rattle the entire chain of life. Changes felt in one population ripple out to affect entire communities and ecosystems—whether they’re composed of pine trees, puffins, or people.…