The Olympics is finally upon us and from going for gold in the tropical Rio climate to boosting the efficiency of jet engines, our ability to cope in high temperatures could make the difference between falling or flying. This week on The Naked Scientists we're exploring the many ways in which humans, and machines, can handle the heat. Plus, which country tops the charts when it comes to height? Also, we'll hear how tomatoes hold the key to fending off a deadly parasite.