TED-ED

The dark history of arsenic - Neil Bradbury
A day in the life of a martial artist in medieval China - Peter Lorge
Do you really need to take 10,000 steps a day? - Shannon Odell
How some friendships last — and others don’t - Iseult Gillespie
Why animals help each other - Ashley Ward
Lady Meng Jiang: The legend of the woman who outwitted an evil emperor - Juwen Zhang
How to make your stress work for you - Shannon Odell
How scientists are creating real-life invisibility cloaks - Max G. Levy
How are these fires burning underground? - Emma Bryce
Why don’t companies want you to repair your stuff? - Aaron Perzanowski
What staying up all night does to your brain - Anna Rothschild
Can you solve the trickster god riddle? - Alex Rosenthal