Can sea water keep roads frost-free? Why does the LHC need to be so cold? How does antifreeze work and what's the freezing point of beer? This week we run the risk of frostbite to tackle the coolest science questions as well as warming up in the hot tub to hear what household appliances devour the most power! We also find out how researchers are growing stem cells from umbilical cord blood, the scientific reason why a needle is so hard to find in a haystack, and how the smell of a fertile woman boosts a man's testosterone. Plus, do people really look like their pets?