TRC #557: Mercury Retrograde + Is All Table Salt Sea Salt? + 'Why We Sleep'

Are you having a bad month, Checkers? Mercury is said to be in retrograde but what does that really mean? Cristina takes us on a little fact-finding mission through the Cosmos to find out. Next, Adam brings the panel another great 'I did not know that!' segment when he breaks down the origin of salt after Neil deGrasse Tyson tweets all salt comes from the Sea. Finally, Darren helps busts some sleep myths after reading 'Why We Sleep' by neuroscientist Matthew Walker.