8.00/10 2012-11-14 55 minutes.HDFeatured segments include: the discovered remains of three-foot-tall humans on the island of Flores, a look at how T. Rex got to be so big, a profile of nanotechnologist Naomi Halas, the issues surrounding stem cells, and the yearly freeze and thaw cycle of the common wood frog.An: 2012Studio: PBSPays: United States of America