What does it take to be an astronaut? Neil deGrasse Tyson, Gary O’Reilly, and Chuck Nice break down the physical effects of being in space and the results of the astronaut twins study with guests astronaut Scott Kelly and biophysicist Chris Mason.
If you want to sleep tonight, skip this episode of StarTalk All-Stars. Bill Nye, Chuck Nice and virus expert Laurie Garrett examine how we’re fighting Zika, Dengue, West Nile, HIV and other viruses – and why the battle may not be going our way.
