The difference between good and bad germs; the "five-second rule."

Super vision, super hearing and super strength aren't just for mythical heroes; the powers are real -- and, believe it or not, people have them.

Whether they're good or bad, everyone has dreams; what dreams mean -- and if it is possible to control them.

Zooming to the farthest reaches of the galaxy to discover what stars are made of, whether aliens could exist and how space affects the human body.

Exploring whether people are in charge of their emotions; digging into feelings, what grosses people out, and whether laughter is contagious.