Welcome back to StarTalk hosted by renowned astrophysicist Neil deGrasse Tyson. Neil is joined by the legendary Dr. Ruth and Kristen Schaal to discuss the Science of Sex.
Guests: Kristen Schaal, Dr. Ruth Westheimer
Subscribe to the StarTalker newsletter: http://bit.ly/WD0EyS
And you can listen to all the classic StarTalk Radio podcasts at http://www.startalkradio.net.