Why do we harvest horseshoe crab blood? - Elizabeth Cox

What it feels like to see Earth from space | Benjamin Grant

Tomás Saraceno: Would you live in a floating city in the sky? (with English subtitles) | TED

Should we get rid of standardized testing? - Arlo Kempf

A smog vacuum cleaner and other magical city designs | Daan Roosegaarde

How young people join violent extremist groups -- and how to stop them | Erin Marie Saltman

How do executive orders work? - Christina Greer

10 Essential Autumn Idioms | Learn English

Dare to refuse the origin myths that claim who you are | Chetan Bhatt

How your pictures can help reclaim lost history | Chance Coughenour

How the US government spies on people who protest -- including you | Jennifer Granick

What are gravitational waves? - Amber L. Stuver

Can a robot pass a university entrance exam? | Noriko Arai

The Present Perfect Tense | English Grammar Lesson

Why we need to end the era of orphanages | Tara Winkler

Is it possible to create a perfect vacuum? - Rolf Landua and Anais Rassat

Fun, Fierce and Fantastical African Art | Wanuri Kahiu | TED

When workers own companies, the economy is more resilient | Niki Okuk

"The Sacred Art of the Ori" | Laolu Senbanjo

How many ways are there to prove the Pythagorean theorem? - Betty Fei

What the sugar coating on your cells is trying to tell you | Carolyn Bertozzi

What would happen if we upload our brains to computers? | Robin Hanson

A lyrical bridge between past, present and future | David Whyte

What moral decisions should driverless cars make? | Iyad Rahwan

The era of blind faith in big data must end | Cathy O'Neil

Where do new words come from? - Marcel Danesi

How to build a company where the best ideas win | Ray Dalio

How I found myself through music | Anika Paulson

10 Words with Interesting Origins (Etymology) | English Vocabulary Lesson

The life cycle of a t-shirt - Angel Chang

The secret to living longer may be your social life | Susan Pinker

❌ Cancelling Plans In English ❌ Useful Vocabulary & Expressions

A practical way to help the homeless find work and safety | Richard J. Berry

7 principles for building better cities | Peter Calthorpe | TED

The science of smog - Kim Preshoff

How artists can (finally) get paid in the digital age | Jack Conte

How I help free innocent people from prison | Ronald Sullivan

How Boredom Can Lead to Your Most Brilliant Ideas | Manoush Zomorodi | TED

Courage is contagious | Damon Davis

The amazing ways plants defend themselves - Valentin Hammoudi

Meet the microscopic life in your home -- and on your face | Anne Madden

A dance to honor Mother Earth | Jon Boogz and Lil Buck

How does impeachment work? - Alex Gendler

5 Pretty Idioms | British English Vocabulary Lesson

Let's end ageism | Ashton Applewhite

How your brain decides what is beautiful | Anjan Chatterjee

How AI can enhance our memory, work and social lives | Tom Gruber

Cell membranes are way more complicated than you think - Nazzy Pakpour