What if…?

Web cartoonist Randall Munroe answers simple what-if questions (“what if you hit a baseball moving at the speed of light?”) using math, physics, logic and deadpan humor. In this charming talk, a reader’s question about Google’s data warehouse leads Munroe down a circuitous path to a hilariously over-detailed answer — in which, shhh, you might…


How does a slinky fall?

When you drop a dangling slinky, does the top fall first, the bottom fall first, do both fall together or does the top fall and the bottom rise? Hint: It’s probably not what you think.

Manu Prakash

Manu Prakash — A 50-cent microscope that folds like origami

Perhaps you’ve punched out a paper doll or folded an origami swan? TED Fellow Manu Prakash and his team have created a microscope made of paper that’s just as easy to fold and use. A sparkling demo that shows how this invention could revolutionize healthcare in developing countries … and turn almost anything into a…