Permafrost; Space Worms; DNA Barcoding - 01 Dec 11

Published: Dec. 1, 2011, 5:40 p.m.

b'This week, Quentin Cooper hears about the impact of thawing permafrost on climate change; how generations of space worms may lead the way for humans to reach Mars; and how DNA barcoding is identifying species and spotting fraud.'