Luis von Ahn
Massive-scale online collaboration
Joshua Foer
Feats of memory anyone can do
Nathan Wolfe
What's left to explore?
Terry Moore
Why is 'x' the unknown?
Sarah Parcak
Archaeology from space
Marco Tempest
The electric rise and fall of Nikola Tesla
Peter Norvig
The 100,000-student classroom
Rives
Reinventing the encyclopedia game
Noah Wilson-Rich
Every city needs healthy honey bees
Stephen Ritz
A teacher growing green in the South Bronx
Daphne Koller
What we're learning from online education
