Andrew Bastawrous: Get your next eye exam on a smartphone

Thirty-nine million people in the world are blind, and the majority lost their sight due to curable and preventable diseases. But how do you test and treat people …

Ambrogio Lorenzetti, Palazzo Pubblico frescos: Allegory and effect of good and bad government

Ambrogio Lorenzetti, Allegory of Good Government, Effects of Good Government in the City and the Country, and Allegory and Effects of Bad Government in the …

The chemical reaction that feeds the world — Daniel D. Dulek

View full lesson: How do we grow crops quickly enough to feed the Earth’s …

Marijuana Minors

Watch the first episode of SMOKEABLES: How to Make a Gravity Bong — For more episodes of Weediquette, click here: …

Urbanization and the future of cities — Vance Kite

View full lesson: About 10000 years ago, hunter-gatherers, aided by rudimentary …

Gary Yourofsky — The Most Important Speech You Will Ever Hear

An inspirational life-changing speech by Gary Yourofsky, an animal liberation activist, national lecturer on animal rights and veganism, and founder of ADAPTT, …

3D Printing LEGO Compatible Bricks That Really Work

Are you a LEGO enthusiast? Did you know that 3D printers have the precision necessary to make LEGO compatible blocks? Design any block you want the sky …

Synthetic biology for the senses| Ani Liu | TEDxBeaconStreet

Can biotechnology be used to create work as moving as music? Where are the thresholds between science and its ability to change our emotional landscape?

Can we make plastic from banana skins? | Elif Bilgin

Meet Elif Bilgin, winner of the Scientific American Science in Action Award and winner of the Voter’s Choice Award for the Google Science Fair 2013.

Is there a difference between art and craft? — Laura Morelli

View full lesson: Was da Vinci an artistic genius? Sure, but he was also born …