In the 15th episode of Exocast:

• Andrew revisits the signals life may or may not leave in a planet’s atmosphere, taking in recent results from the NExSS biosignature workshop.
• Hugh details the pros & cons of NASA’s upcoming planet-hunting machine, the Transiting Exoplanet Satellite Survey, or TESS, mission.
• Hannah covers the breaking news, including a host of new results from the Kepler mission.

and

• Hugh adopts the mini-Mercury Kepler-37b into our collection, the smallest planet yet found around a main sequence star.