At TED University Session 2 this morning, we discovered the science behind our smiles, witnessed a tale of a valiant shoe rescue, and heard about the “rich seed beds of serendipity.” Here are just a few of the highlights:

Googler Amit Sood used his “20 percent” time to develop the  Google Art Project, which transports us to museums of the world to explore timeless masterpieces up close and personal.

Candy Chang designs “I Wish This Was” stickers to empower a community voice in the transformation of empty storefronts. A few of our favorites: I Wish This Was… my produce market … real soul food …full of nymphomaniacs with PhDs.

Brian O’Sullivan gave us step-by-step directions on how to build a wind turbine, from the initial research on nearby wildlife to the assembly of the football field-sized blades.

All photos: TED / James Duncan Davidson