Jim Carrey as Truman Burbank, a man living in someone else's dream. The 1998 movie The Truman Show asks us to look at experience and reality with fresh eyes.
Melinda Sue Gordon/The Kobal Collection/Paramount
A computer designed by hobbyists to look like a brain on display at a Berlin fair in 2012. What happens when we go from crude models to complete working simulations of this all-important organ?
Britta Pedersen/DPA/AFP/Getty Images