What happens when a woolly mammoth gets frozen during the Ice Age and defrosted in the 20th century? Find out as Phil, the big woolly star of CRO, tells his modern-day friends Dr. C and Mike about life in pre-historic times. Cro (a Cro-Magnon boy) and Phil were friends a long time ago, and in this cartoon we get a peek at Cro's adventures during the Ice Age through Phil's eyes.