|Are Stupid People More Confident?|
We've all heard about the supposed relationship between confidence and knowledge - but is it true? Two researchers think they've found the answer.
October 24, 2016 | 4 min
|How Does Saliva Work?|
Your saliva makes things taste great while killing bacteria and helping digestion.
October 19, 2016 | 7 min
|What Causes Red Eye In Photos?|
How can a camera's flash make your eyes glow red? Tune in to learn how it works -- and how to prevent it.
October 17, 2016 | 3 min
|Why Do Men Have Deeper Voices?|
Christian explains why male humans' voices generally get lower than female humans' during puberty.
October 12, 2016 | 6 min