Luke Kemp [@LukaKemp], a Research Associate at Cambridge’s Centre for the Study of Existential Risk, on a new study that says we need to put more attention on the possibility of human extinction and other climate catastrophes. Bryan Walsh [@bryanrwalsh], editor of Vox’s ‘Future Perfect,’ also explains why our brains have a hard time processing catastrophes like climate change. Listen.

Charles Piller [@cpiller], investigative reporter for Science Magazine, on his six month investigation into how faulty images may invalidate groundbreaking advancements in Alzheimer's research. Listen.

Guido Tonelli, a particle physicist at CERN, the European Organization for Nuclear Research, on the importance of creation myths, and what scientists can tell us about the fragility of the universe. Listen.