We reach for the skies on this week's Naked Scientists, with High Altitude Adventures. We find out how the body reacts to the low oxygen at high altitudes, and join Laura Soul testing the theories on a trek up to Everest base camp. Plus, we find out how the continental collisions that made mountains may have plunged the Earth into an ice age. We also hear how the rate of mutation changes in lab-bench evolution, how looming sounds make our vision more sensitive, why poking a stem cell can change its fate and the chemistry behind the taste of fizz. In Kitchen Science, we make a mountain... Like this podcast? Please help us by supporting the Naked Scientists