Do sunken cities really exist? And what can we learn from their watery depths? t.ted.com/zdhf0xp

Aphids are some of the most prolific poopers on the planet, producing hundreds of kilograms per acre.

But their poop is not like your poop: t.ted.com/vJVe9c4

Ready to exercise your constitutionally protected right to protest?

Before you go, know your rights: t.ted.com/QuLnSdw

If even one dangerous virus escapes a research lab, it could cause a global pandemic.

So, what can we do to minimize risk? And is the knowledge gained even worth the risk in the first place? t.ted.com/I9jyqka

NEW VIDEO: Trace the rise and fall of the Maya Empire’s most powerful city: t.ted.com/FBGnI9D

Nearly a quarter of the Netherlands is below sea level and the country lies along the delta of 3 major European rivers— making the region extremely vulnerable to flooding.

So why isn’t it underwater? t.ted.com/PVjWrEM

There is greatness in you!

While results of standardized testing can help us understand some things, they can be misleading if used incorrectly: t.ted.com/1z1lkW7

On #WorldBookDay , we wanted to know: what are the books kids love to dig into on their own? t.ted.com/s0QSTw6

Happy birthday, William Shakespeare!

Explore the Bard’s most enigmatic play— a story of shipwreck, magic, and power: t.ted.com/xDjdThz

NEW VIDEO: Is math built on the wrong rules?

Dig into why one of the foundational rules of mathematics is so controversial: t.ted.com/is8B1Gk

With a stomach of steel that can digest diseased meat and waste, vultures are essential to removing dangerous bacteria from our ecosystems.

Get to know more about these misunderstood— and endangered— creatures: t.ted.com/1GYwnl0

Every year, the Sahara Desert receives over 100 times more energy from the Sun than humanity consumes annually.

So, could covering the desert with solar panels solve our energy problems? #EarthDay t.ted.com/3NYp5Ai

Stay informed this #EarthDay by finding out what really happens to the plastic you throw away: t.ted.com/iJO13AU

What is acid rain, and why don’t we hear about it anymore? #EarthDay t.ted.com/6uFUrqJ

Happy #EarthDay !

Find out what makes trees so important to a city’s survival: t.ted.com/1CkEVpZ

Who were the three lost sisters?

Get to know their story, and find out what brought them back together: t.ted.com/klIjznw

“We are not going to sit on our hands doing nothing. We will fight climate change. That's why we have promised to remain carbon neutral.”

This country isn't just carbon neutral — it’s carbon negative: t.ted.com/6PTUKyz

Do you ever feel like your lack of self-confidence stops you from doing things you want to do?

Take a closer look at that impulse: t.ted.com/N5Akcjo

Today, marijuana’s therapeutic benefits are widely acknowledged, but a growing recognition for its medical value doesn’t answer the question: is recreational marijuana use bad for your brain? t.ted.com/WuV9jFA