All out of nutmeg? The same algorithms that predicts your friends on Facebook can also figure out ingredient substitutions for your pumpkin pie this Thanksgiving. Courtesy of Lada Adamic. hide caption

itoggle caption Courtesy of Lada Adamic.

The warmer orange colors show parts of the brain most active during improvisational rap. The blue regions are most active when rappers performed a memorized piece. NIDCD hide caption

itoggle caption NIDCD