Evidence for carbonate minerals has shown up on Mars in the eroded terrain of Nili Fossae. Formed in the presence of water, such areas might once have provided a suitable habitat for life. More at New Scientist.
In the first half of the program, host Dave Schrader (email) welcomed author and crime researcher, Diane Fanning, who discussed the terrifying case of Tommy Lynn Sells, a serial killer who made his way across the country for two decades. Open Lines followed in the latter half.