Mystery hour - Why are their 5 olympic rings?

26/07/2012 47 min
Mystery hour - Why are their 5 olympic rings?

Listen "Mystery hour - Why are their 5 olympic rings?"

Episode Synopsis

Mystery hour questions today included: first part of the body to develop in the womb, why do we feel sleepy when we're warm, speed of serve in tennis and how do markings stay from a tattoo?