Hi, I'm Ron Pisaneschi. My Pick for next time is NOVA's "Megabeast's Sudden Death." Scientists believe a massive break-up of a comet over the Great Lakes may have led to the extinction of more than 34 types of large prehistoric animals at the end of the last Ice Age. Scientists also look for microscopic diamonds believed to be the result of a powerful impact of extraterrestrial origin, in a 13,000-year-old Greenland ice layer. That's NOVA's Megabeast's Sudden Death," Tuesday, February 23rd at 7:00 p.m. Mountain/8:00 p.m. Pacific. And that's my pick for next time.