WWII bunkers, thugs and aliens, and calving glaciers

07 July 2011

This week in the Planet Earth Podcast, why weathermen are using a converted World War II bunker to monitor clouds; how thug species such as bramble, nettle and bracken can be just as damaging to woodlands as alien plants; and why scientists are going to Greenland to deploy a network of sensors in some of the country's glaciers.

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