TED-Ed
TED-ED: Why do animals form swarms? - Maria R. D'Orsogna
When many individual organisms come together and move as one entity, that's a swarm. From a handful of birds to billions of insects, swarms can be almost any size. They have no leader, and members interact only with their neighbors or...
SciShow
Slime Mold: A Brainless Blob that Seems Smart
Slime molds look gross and... not smart, but they definitely seem to communicate and plan even without neurons. Michael explains the science behind these clever eukaryotes.
Crash Course Kids
The End Is Only The Beginning
It's the end of this first year of Crash Course Kids and we've learned so many things. In this episode, Sabrina takes us on a tour of some of the ideas we've talked about and how they fit into our lives. Also, what all of these ideas...
Crash Course Kids
The Dirt on Decomposers
We've talked about food chains and how energy moves through an ecosystem, but let's take a step back and see how everything starts... and ends. Decomposers! This first series is based on 5th grade science. We're super excited and hope...
Crash Course
How Do Outbreaks Start? Pathogens and Immunology - Crash Course Outbreak Science
You may not realize it, but your body is like a fortress, designed to defend you from tiny foreign invaders known as pathogens. This seemingly small world is actually super diverse, and sometimes super dangerous too. That’s why in this...
PBS
When Giant Fungi Ruled
420 million years ago, a giant feasted on the dead, growing slowly into the largest living thing on land. It belonged to an unlikely group of pioneers that ultimately made life on land possible -- the fungi.
Bozeman Science
Endosymbiosis
Paul Andersen explains how eukaryotic cells were formed through a process of endosymbiosis. He describes how aerobic bacteria became mitochondria and cyanobacteria became chloroplasts. He mentions an example of symbiosis that occurs...
SciShow Kids
The 5 Fabulous Food Groups
Learn about our 5 main food groups with Jessi and Squeaks, then see if you can name them all!
Crash Course Kids
Who Needs Dirt?
So... do plants need dirt? The truth might shock you. In this episode of Crash Course kids, Sabrina talks about how plants get energy and how that energy is transported around them. Also, she talks about dirt.
Crash Course Kids
Food Webs
Last time we put a Polar Bear in the desert and we still feel bad about that, but there's a lot more going on in ecosystems than just temperature. In fact, there are so many elements in ecosystems, that if just one leaves or gets out of...
Crash Course
Capitalism and Socialism Crash Course World History
In which John Green teaches you about capitalism and socialism in a way that is sure to please commenters from both sides of the debate. Learn how capitalism arose from the industrial revolution, and then gave rise to socialism. Learn...
SciShow Kids
How Does A Seed Become A Plant?
Jessi and Squeaks show you how a tiny seed, like the kind you eat in your trail mix! Grows into a big plant!
Crash Course
The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry
Today's Crash Course Chemistry takes a historical perspective on the creation of the science, which didn't really exist until a super-smart, super-wealthy Frenchman put the puzzle pieces together - Hank tells the story of how we went...
Bozeman Science
The Molecules of Life
Paul Andersen describes the macromolecules that make up living organisms. He starts with a brief description of organic chemistry and the importance of functional groups. He also covers both dehydration and hydrolysis in polymerization....
Bozeman Science
r and K selection
Paul Andersen explains the differences between an r and a K selected species. He starts with a brief description of population growth noting the importance of; r or growth rate, N or number of individuals in the population, and K the...
Crash Course
Natural Selection - Crash Course Biology
Hank guides us through the process of natural selection, the key mechanism of evolution.
TED Talks
Jasmine Crowe: What we're getting wrong in the fight to end hunger
In a world that's wasting more food than ever before, why do one in nine people still go to bed hungry each night? Social entrepreneur Jasmine Crowe calls for a radical transformation to our fight to end global hunger -- challenging us...
Bozeman Science
Photosynthesis
Paul Andersen explains the process of photosynthesis by which plants and algae can convert carbon dioxide into useable sugar. He begins with a brief description of the chloroplast. He describes the major pigments in a plant (like...
TED Talks
Ellen Gustafson: Obesity + hunger = 1 global food issue
Co-creator of the philanthropic FEED bags, Ellen Gustafson says hunger and obesity are two sides of the same coin. In her talk, she launches The 30 Project -- a way to change how we farm and eat in the next 30 years, and solve the global...
Crash Course
Migrations and Intensification: Crash Course Big History
In which Hank and John Green teach you about humanity conquering the Earth. Or at least moving from Africa into the rest of the Earth. As human beings spread out across the world and populations grew, humanity reached a critical mass of...
Crash Course
Influence & Persuasion: Crash Course Media Literacy
We’ve mentioned already that there’s a lot of money in media and a huge chunk of that money is spent on trying to get you to do something – buy something, vote a certain way, change a behavior. How does advertising work? And what’s the...
Crash Course Kids
Home Sweet Habitat: Crash Course Kids
How would a Polar Bear do if you put it in the desert? Not well. But why? Why can't anything live anywhere? Well, this has to do with Habitats and how animals (including humans) are suited for living in one place over another. In this...
Bozeman Science
Energy Flow in Ecosystems
In this video Paul Andersen explains how energy flows in ecosystems. Energy enters via producers through photosynthesis or chemosynthesis. Producers and consumers release the energy from food through cellular respiration. An explanation...