How turtle shells evolved… twice – Judy Cebra Thomas

From TED Ed. Check out the fascinating science behind the evolution of the turtle shell, over 260 million years in the making. — Modern turtle shells are almost as diverse as the turtles themselves. Sea turtles have flatter, lighter shells for gliding through the water. Land-dwelling tortoises have domed shells that can slip free of…

A brief history of cannibalism – Bill Schutt

From TED Ed. Human cannibalism is a lot more common than you might think. Dive into its complex history and see its uses in medicine, cultural rituals and in times of survival. — 15th century Europeans believed they had hit upon a miracle cure: a remedy for epilepsy, hemorrhage, bruising, nausea and virtually any other…

Ancient Rome’s most notorious doctor – Ramon Glazov

From TED Ed. Learn about the Greek physician and philosopher Galen of Pergamon, whose experiments and discoveries changed medicine. — In the 16th century, an anatomist named Andreas Vesalius made a shocking discovery: the most famous human anatomy texts in the world were wrong. While Vesalius knew he was right, announcing the errors would mean…

Can you solve the dark matter fuel riddle? – Dan Finkel

From TED Ed. An ancient, abandoned alien space station has been discovered. Can you beat everyone in the galaxy and reach it first? — It’s an incredible discovery: an abandoned alien space station filled with precursor technology. Now every species in the galaxy is in a mad dash to get there first, but you’ve got…

Why should you read “Hamlet”? – Iseult Gillespie

From TED Ed. Explore William Shakespeare’s classic tragedy, “Hamlet,” a play about conspiracy, deception and the tragic consequences of indecision. — “Who’s there?” Whispered in the dark, this question begins a tale of conspiracy, deception and moral ambiguity. And in a play where everyone has something to hide, its answer is far from simple. Written…

How do crystals work? – Graham Baird

From TED Ed. What makes crystals grow into their signature shapes? Dig into the atomic patterns and unique properties of crystals. — Many crystals have signature shapes— like the cascade of pointed quartz or a pile of galena cubes. Every crystal’s atoms have a defining feature: their organized, repeating pattern. The pattern isn’t restricted to…

Your body vs. implants – Kaitlyn Sadtler

From TED Ed. Why do medical implants like insulin pumps and prosthetic knees need replacement? Explore how the immune system fights implants and how new devices are trying to help. — Insulin pumps improve the lives of millions of people with diabetes around the world by monitoring blood sugar, delivering insulin, and preventing the need…

Ugly History: Witch Hunts – Brian A. Pavlac

From TED Ed. Uncover the history of the witch hunts that swept through Europe and the American colonies from the 15th century until the 18th century. — In the German town of Nördlingen in 1593, innkeeper Maria Höll found herself accused of witchcraft. She was arrested for questioning, and denied the charges. She insisted she…

How close are we to eradicating HIV? – Philip A. Chan

From TED Ed. Can we end HIV? Find out how medications like PrEP are helping to prevent the transmission and spread of HIV, and possibly leading to its eradication. — The world is getting closer to achieving one of the most important public health goals of our time: eradicating HIV. And to do this, we…

You are more transparent than you think – Sajan Saini

From TED Ed. Discover how scientists are using light and integrated photonics technology to create medical devices that can diagnose illness. — It’s an increasingly common sight in hospitals around the world: a nurse measures our height, weight, blood pressure, and attaches a glowing plastic clip to our finger. Suddenly, a digital screen reads out…