This week's most informative and challenging podcasts from the internet: Planetary Radio (7-9) tells of the Starship Initiative, EarthSky 8--Frank Hill says, "No new ice age," and from TED--Jane McGonigal says, "Gaming extends life." (TEDTalks videos at www.TED.com/talks) If you miss this broadcast, it is archived on this website as a podcast: click on Talk Shows--Monday Forum--(select date).