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Shedding light on dark matter - Patricia Burchat

Source: TED Ed

eng

Physicist Patricia Burchat sheds light on two basic ingredients of our universe: dark matter and dark energy. Comprising 96% of the universe between them, they can't be directly measured, but their influence is immense. View more

On spaghetti sauce - Malcolm Gladwell

Source: TED Ed

eng

Tipping Point author Malcolm Gladwell gets inside the food industry's pursuit of the perfect spaghetti sauce -- and makes a larger argument about the nature of choice and happiness.

A day in the life of an ancient Athenian

Source: TED Ed

Author: Garland, Robert

eng

It’s 427 BCE and the worst internal conflict ever to occur in the ancient Greek world is in its fourth year. Athens is facing a big decision: what to do with the people of Mytilene, a city on the island of Lesbos where a revolt against Athenian rule has just been put down. How did these kinds of decisions get made? Robert Garland outlines a day in the life of Athenian democracy. View more

The most successful pirate of all time

Source: TED Ed

Author: Murray, Dian

eng

At the height of their power, infamous Caribbean pirates like Blackbeard and Henry Morgan commanded as many as 10 ships and several hundred men. But their stories pale next to the most successful pirate of all time, who commanded 1,800 vessels, made enemies of several empires, and still lived to old age. Dian Murray details the life of the fearsome Madame Zheng. View more

Can you solve the seven planets riddle?

Source: TED Ed

Author: Meyer, Edwin F.

eng

Your interstellar police squad has tracked a group of criminals to a cluster of seven planets. Now you must apprehend them before their reinforcements arrive. Of course, the fugitives won’t just stay put – they’ll try to dodge you by moving from planet to planet. Can you devise a sequence for searching the planets that’s guaranteed to catch them in ten warps or less? Edwin F. Meyer shows how. View more

A day in the life of a Roman soldier

Source: TED Ed

Author: Garland, Robert

eng

The year is 15 CE, and the Roman Empire is prospering. Most of the credit will go to the emperor, but this success wouldn’t have been possible without loyal soldiers like Servius Felix. Robert Garland illuminates what life was like for a solider in the Roman army. View more

What happens during a stroke?

Source: TED Ed

Author: Goswami, Vaibhav

eng

Every two seconds, someone in the world has a stroke. One out of every six people will have a stroke at some point in their lives. Strokes deprive brain cells of oxygen and are one of the most common causes of death, and a leading cause of preventable disability. But what causes strokes in the first place? And what can doctors do to treat them? Vaibhav Goswami takes us into the body to find out. View more

How squids outsmart their predators

Source: TED Ed

Author: York, Carly Anne

eng

There are about 500 species of squid, and they live in all the world’s oceans, making them a reliable food source for whales, dolphins, sharks, seabirds, fish - and even other squid. As a result, the squid's most extraordinary adaptations are those that have evolved to help them thwart these predators. Carly Anne York explains how these stealthy cephalopods have mastered deep sea survival. View more

How do birds learn to sing? – Partha Mitra

Source: TED Ed

Author: Mitra, Partha

eng

A brown thrasher knows a thousand songs. A wood thrush can sing two pitches at once. A mockingbird can match the sounds around it — including car alarms. These are just a few of the 4,000 species of songbirds. How do these birds learn songs? How do they know to mimic the songs of their own species? Are they born knowing how to sing? Partha P. Mitra illuminates the beautiful world of birdsong. View more

What would it be like to live on the moon?

Source: TED Ed

Author: Gendler, Alex

eng

The European Space Agency is hoping to establish an inhabited research base on the moon by the 2020s. But living in this "moon camp" won’t be easy. How will humans deal with the cosmic radiation? What will the inhabitants eat? And what's the point, anyway? Alex Gendler details the challenges and benefits of building a lunar colony. View more

What is the Internet of Things?

Source: TED Ed

eng

The Internet of Things gives us access to the data from millions of devices. But how does it work, and what can we do with all that data? Find out in this animated tutorial from IBM's Think Academy.

Why you should define your fears instead of your goals

Source: TED Ed

eng

The hard choices - what we most fear doing, asking, saying - are very often exactly what we need to do. How can we overcome self-paralysis and take action? Tim Ferriss encourages us to fully envision and write down our fears in detail, in a simple but powerful exercise he calls "fear-setting." View more

Could we cure aging during your lifetime?

Source: TED Ed

eng

What if we could stop aging forever? Kurzgesagt – In a Nutshell looks at three different tools scientists are experimenting with to prevent aging in humans.

When will the next ice age happen?

Source: TED Ed

Author: Lisiecki, Lorraine

eng

Throughout Earth’s history, climate has varied greatly. For hundreds of millions of years, the planet had no polar ice caps. Without this ice, the sea level was 70 meters higher. At the other extreme, about 700 million years ago, Earth became almost entirely covered in ice, during an event known as “Snowball Earth.” What causes these swings in the planet’s climate? Lorraine Lisiecki investigates. View more

A simple way to tell insects apart

Source: TED Ed

Author: Hazra, Anika

eng

There are nearly a million known insect species in the world, but most have one of just five common types of mouthparts. Why is this information useful to scientists? Anika Hazra explains how the features of an insect’s mouthparts can help identify which order it belongs to, while also providing clues about how it evolved and what it feeds on. View more

The surprising reasons animals play dead

Source: TED Ed

Author: Thys, Tierney

eng

From lemurs to lizards, ants to amphibians, sharks to chickens, hundreds of animals "play dead" as a survival tactic. But how and why do animals do this? Tierney Thys explains how this curious behavior, known as tonic immobility or TI for short, can be used as a defense or offense. View more

The myth of Thor's journey to the land of giants

Source: TED Ed

Author: Mellor, Scott

eng

Thor—son of Odin, god of thunder, and protector of mankind—struggled mightily against his greatest challenge yet: opening a bag of food. How had the mighty god fallen so far? Scott Mellor tells the myth of Thor's journey to Utgard. View more

The coin flip conundrum

Source: TED Ed

Author: Loh, Po-Shen

eng

When you flip a coin to make a decision, there's an equal chance of getting heads and tails. What if you flipped two coins repeatedly, so that one option would win as soon as two heads showed up in a row on that coin, and one option would win as soon as heads was immediately followed by tails on the other? Would each option still have an equal chance? Po-Shen Loh describes the counterintuitive math behind this question. View more

The science of hearing

Source: TED Ed

Author: Douglas, Oliver

eng

The ability to recognize sounds and identify their location is possible thanks to the auditory system. That’s comprised of two main parts: the ear, and the brain. The ear’s task is to convert sound energy into neural signals; the brain’s is to receive and process the information those signals contain. To understand how that works, Douglas L. Oliver follows a sound on its journey into the ear. View more

The science of skin

Source: TED Ed

Author: Bryce, Emma

eng

Between you and the rest of the world lies an interface that makes up 16% of your physical weight. This is your skin, the largest organ in your body: laid out flat, it would cover close to 1.7 square meters of ground. But besides keeping your organs in, what is its purpose? Emma Bryce takes us into the integumentary system to find out. View more

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