Be Smart
The Great Oxygenation
New ReviewLife’s been around on Earth for at least 3.7 billion years. But for most of that time, it was incredibly boring — just simple little cells squirming around in water. It only got interesting in the last few hundred million years. And that...
SciShow
The End of Lab Rats
We've been using lab rats for over a hundred years, and they've been part of some of the biggest medical breakthroughs ever. But what comes next? From organs on a chip to computer simulations, here are some of the ways that science might...
Crash Course
The Scientific Method: Crash Course Biology #2
Science offers a way of discovering and understanding the world around us, driven by questions and tested with evidence. And it’s a twisty-turny team effort— you won’t find many lone geniuses out there, or straight lines from hypothesis...
SciShow
Why Can't Hand Sanitizer Kill The 0.01% of Germs?
There's a scientific reason most hand sanitizers claim they can kill 99.99 percent of germs, and there's only one way to deal with the rest. Correction: there is a typo in the credits. This episode was written by Roshni Bhatt Hosted by:...
SciShow
This New Drug Makes the Flu Less Deadly
Seasonal flu kills half a million people every year. But scientists may have found a drug that, while it won't stop you from getting the flu, could stop it from killing you. Hosted by: Hank Green (he/him)
SciShow
Why Elephants Rarely Get Cancer
One fun fact about elephants is that they're a lot less likely to get cancer than other animals (including us). Another fun fact is that unlike most warm-blooded animals, their testes are deep inside their bodies. It turns out, these two...
Crash Course
Viruses & Vaccines: How Do Vaccines Work?: Crash Course Biology 39
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 viruses are like genes in a box, and how they invade and spread between cells. We’ll also discover...
Crash Course
Meiosis: Why Are All Humans Unique?: Crash Course Biology #30
Ever wonder why we aren’t exact clones of our parents, or why siblings aren’t exactly alike? The reason traces back to meiosis. In this episode of Crash Course Biology, we’ll discover how egg and sperm cells get made and learn why you’re...
Crash Course
Mitosis & the Cell Cycle: How Cells Clone Themselves: Crash Course Biology #29
What’s the life of a cell like? In this episode of Crash Course Biology, we’ll follow a cell’s life cycle, from its beginning as a shiny new cell all the way to division via mitosis. We’ll learn how our cells control this process, and...
Crash Course
Chemical Reactions in Biology: Crash Course Biology #26
Cells need energy to power the chemical reactions that keep their microscopic cities running, and most of that energy comes from a chemical called ATP. In this episode of Crash Course Biology, we’ll learn how our cells use energy, what...
Crash Course
Why Do Cells Need to Communicate?: Crash Course Biology #25
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 Course Biology, we’ll learn that our cells are in constant communication, reminding each...
Crash Course
Cell Membranes: How Does Stuff Get Into Your Cells?: Crash Course Biology #24
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 episode of Crash Course Biology, we’ll look at the structure of the bilayer, learn about its...
Crash Course
A Tour of the Cell: Crash Course Biology #23
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 episode of Crash Course Biology, we’ll take a look at the difference between...
TED Talks
What I learned about freedom in a secret Chinese prison | Lei Cheng
Accused of leaking state secrets, journalist Lei Cheng was imprisoned in China for more than three years, where she was detained in tight quarters and kept under constant supervision. “Freedom is wasted on the free,” she says, recounting...
MinuteEarth
Epigenetics: Why Inheritance Is Weirder Than We Thought
Epigenetics: Why Inheritance Is Weirder Than We Thought
Bozeman Science
The Hierarchy of Life
Paul Andersen explains how biology is ordered in the hierarchy of life. He first of all describes how emergent properties appear as you move to more inclusive systems. The then describes life at the following levels; atom, molecule,...
SciShow
Can Rock and Roll Replace Your Insulin?
Could rock music one day replace your insulin injections? Scientists are pioneering music-controlled cells that could provide the perfect dose of insulin for type 1 or type 2 diabetes with just a bit of music. Specifically, Queen's "We...
TED Talks
TED: What if a simple blood test could detect cancer? | Hani Goodarzi
Catching cancer at its earliest stages saves lives. But in a body made up of trillions of cells, how do you spot a small group of rogue cancer cells? Biomedical researcher Hani Goodarzi discusses his lab's discovery of a new class of...
SciShow
We May Be Able To Grow Human Organs In Animals. Should We?
Seventeen people in the US die /every day/ waiting for an organ transplant, usually a kidney. One approach is to grow extra kidneys in pigs, an idea known as xenotransplantation. We'll look at two recent milestones, as well as the...
Bozeman Science
The Endocrine System
Paul Andersen explains the major elements in the endocrine system. He explains how glands produce hormones which target cells. He differentiates between water soluble and lipid soluble hormones. He then describes the hormones and actions...
SciShow
The Science Behind Sleep & Love Potions
Sure, potions of invisibility and immortality may be a little hard to come by in the real world, but there's some legit science behind less fantastic ones. Historical sleep and love potions are grounded in science, even if some of the...
SciShow
The Ice Bucket Challenge Actually Worked
The Ice Bucket Challenge raised millions of dollars for research into treatments for ALS, or Lou Gehrig's disease. Where did that money go? Into characterizing new genes that we may be able to target with chemotherapy drugs like paclitaxel!
Amoeba Sisters
Genetic Engineering
Explore an intro to genetic engineering with The Amoeba Sisters. This video provides a general definition, introduces some biotechnology tools that can be used in genetic engineering, and discusses some related vocabulary (such as...