The cell membrane is a protein-studded phospholipid bilayer that not onl...

The cell is the basic unit of life, and our understanding of it has advanced as science, and the tools ava...

There’s an immense world of tiny stuff within us and around us—but how do we know...

This is a love letter to water, life’s solvent, and one of the most wonderful molecules arou...

Despite the diverse appearance and characteristics of organisms on Eart...

What’s a human? And how did we become humans, anyway? In this episode of Crash Course Biology, we’ll me...

Everywhere you look on Earth, you’ll find wonderful and...

Crocodiles, and birds, and dinosaurs—oh my! While classifying organisms is nothing new, phy...

Humans may have been around for a long time, but life has existed for way longer....

How can you tell two species apart? It’s not always simple. In this episode of Crash...

In this episode of Crash Course Biology, we’ll learn about the wa...

There are lots of ways that evolution happens, and natural selection is just o...

Whether we’re talking about tigers, trees, or tarantulas, evolution happe...

We’ve learned a lot about plants throughout this series, but there’s much more to discover. In this episo...

From a single-celled common ancestor, evolution has brought us...

Whether in a desert, the savanna, or a tropical rainforest, plants ha...

Some scientists believe we are in the middle of Earth...

From the driest deserts to the lushest forests, ecosystems are networks of lif...

Climate change shakes up all of Earth’s systems, including the living ones. In this episode of C...

The social dynamics of plants are as complex as those at an...

Life on Earth has weathered boiling-hot oceans and volcanic-ash-darkened skies—but that’s nothing like...