HDMovies

In 40 videos, Hank Green teaches you biology! This course is based on the AP Biology curriculum and also covers some introductory anatomy. By the end...

In 50 episodes, we’re going to explore biology—the science of life. Dr. Samuel Ramsey will guide you through life’s vast...

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...

Science offers a way of discovering and understanding the world around us, driven by questions and tested with evidence. And it’s a...

A biologist’s natural habitat is anywhere questions about life are being asked—whether the subject is a nematode or a narwhal, a single...

Here on Earth, life is dizzyingly diverse—but it’s also surprisingly organized. A sense of order structures life and its processes, from...

Ecology is the study of the interactions of living things with each other and their environment. It’s a field that not only lets us explore the...

Community ecology is the study of interactions between different species of living things, and lets ecologists examine the effects of predator-prey...

When the Bald Eagle population started to decline in the mid-20th century, scientists began to ask why. Population ecology, the study of organisms of...

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

Climate change shakes up all of Earth’s systems, including the living ones. In this episode of Crash Course Biology, we’ll see how...

Some scientists believe we are in the middle of Earth’s sixth mass extinction: a big, precarious game of Jenga that involves every ecosystem on...

From a single-celled common ancestor, evolution has brought us all of Life’s Greatest Hits — including butterflies, beetles, bacteria,...

Whether we’re talking about tigers, trees, or tarantulas, evolution happens at the level of the population. In this episode of Crash Course...

There are lots of ways that evolution happens, and natural selection is just one of them. In this episode of Crash Course Biology, we’ll find...

In this episode of Crash Course Biology, we’ll learn about the ways population genetics reveals how groups of living things evolve—by...

How can you tell two species apart? It’s not always simple. In this episode of Crash Course Biology, we’ll learn about speciation—a...

Humans may have been around for a long time, but life has existed for way longer. In this episode of Crash Course Biology, we’ll journey...

Crocodiles, and birds, and dinosaurs—oh my! While classifying organisms is nothing new, phylogeny— or, grouping organisms by their...

Everywhere you look on Earth, you’ll find wonderful and diverse living things, from tiny tardigrades to soaring sequoias. And incredibly,...

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...

Despite the diverse appearance and characteristics of organisms on Earth, the chemicals that make up living things are remarkably similar, often...

This is a love letter to water, life’s solvent, and one of the most wonderful molecules around. In this episode of Crash Course Biology,...

There’s an immense world of tiny stuff within us and around us—but how do we know about it? In this episode of Crash Course Biology,...

The cell is the basic unit of life, and our understanding of it has advanced as science, and the tools available to scientists, has advanced. In this...

The cell membrane is a protein-studded phospholipid bilayer that not only protects our cells, but also regulates what goes in and out. In this...

Even though it might seem like our bodies are on autopilot, there is a whole lot happening inside us to keep things moving. In this episode of Crash...

If nearly all your cells have the same DNA, why are muscle cells so different from skin cells? In this episode, we’ll learn how gene expression...

Science fiction is full of superpowered mutants, but in reality, mutations are much more diverse and complex. Sometimes, they can change...

Bacteria often get a bad rap, but they’re some of our best partners in science and medicine! In this episode, we’ll explore what bacteria...

From the flu to COVID-19, viruses are a major threat in our everyday lives. In today’s episode of Crash Course Biology, we’ll learn why...

On its own, a huge DNA sequence is a meaningless pile of data — so, how do biologists figure out what it means? They turn to the power of...

There are countless types of plants and animals on Earth, but how do they work? In this episode of Crash Course Biology, we’ll take a...

Plants may not seem like they’re doing much, but if you look closer, you’ll find a whole world just lurking beyond the surface....

Yep, this is the poop episode. Getting resources and getting rid of waste is so important, we have three whole systems dedicated to it! In this...

When you think about the body’s infrastructure, you probably think of bones. But what about the heart, the blood vessels, and the lymphatic...

The world is full of microbes and viruses that can get us sick, but we’ve got an Avengers-style defense system ready to take them on. In this...

If cells and organs never talked to each other, an animal would fall apart faster than a boy band after the popular one goes solo. Thankfully,...

When it comes to animal reproduction, there’s no one-size-fits-all strategy. Some animals need a mate, others don’t, and for some, it...

We tend to think life fits in two tidy categories: male or female, XX or XY. But it’s so much more diverse and complicated! In this episode of...

Why do animals do what they do? It’s a huge question, and in this episode, we’ll learn how scientists break it down. We’ll talk...

Biology connects all of life—all of YOUR life. In the final episode of Crash Course Biology, Dr. Sammy is taking your questions. No matter how...

Host, Gordie Lucius goes on a grand adventure to learn everything he can about nature. Where did life come from? Why are animal’s genitals so...

David Attenborough embarks on a remarkable 500 million-year journey revealing the extraordinary group of animals that dominate our world, and how...

The Body Machine is a landmark special on the human body that shows us just how much, how many, how large, how strong, how fast - just how amazing...

Destinos: An Introduction to Spanish, also known simply as Destinos, is an educational television program created by Bill VanPatten, who was, at the...

Over the course of 15 episodes, we’re going to learn about botany—the study of plants. Alexis Nikole Nelson will teach you about how...