Angelo Mosso's "human circulation balance" machine worked like a seesaw to measure blood flow changes to the brain. Sandrone et al., 2014, Brain hide caption

itoggle caption Sandrone et al., 2014, Brain

Hearing 50 Cent's "In Da Club" made music-listeners feel more powerful. YouTube hide caption

itoggle caption YouTube

This little guy changes from flat sheet of paper to critter in about four minutes. Seth Kroll/Wyss Institute hide caption

itoggle caption Seth Kroll/Wyss Institute

These TED Radio Hour stories are the perfect road trip companions. iStockphoto hide caption

itoggle caption iStockphoto

"You need to fold the worst events of your life into a narrative of triumph, evincing a better self in response to things that hurt." — Andrew Solomon James Duncan Davidson/TED hide caption

itoggle caption James Duncan Davidson/TED