Why do bright lights trigger sneezes?

Chris Smith from The Naked Scientists takes on YOUR questions with Eusebius McKasier from talk radio 702. Could gravity from my first-floor apartment impact my sleep patterm? Why do hearts beat faster when we're excited? What are the consequences of dental surgery? Is prejudice carried in DNA? How does a master-key work? Does exercise and breathing more oxygen increase the ageing process? Why do bright lights cause sneezes? Plus, the single use plastic that saved endangered snails in Bermuda. Like this podcast? Please help us by supporting the Naked Scientists