Researchers at Caltech and Harvard have created an artificial jellyfish using a silicone base and rat heart cells. Dubbed a "Medusoid," the synthetic creature swims in water in a similar fashion to a real jellyfish. More at BBC News and LiveScience.
Freelance journalist Zoe Cormier, a science writer and photographer with a background in biology, joined George Knapp in the first half to discuss her new book Sex, Drugs and Rock 'n’ Roll: The Science of Hedonism.
In the later half, David Browne, longtime music journalist and contributing editor at Rolling Stone, delved into the Grateful Dead, the band that became a musical and cultural phenomenon that has spanned generations.