Operation Cloud Lab: The team start their expedition by exploring clouds, which play a vital role in the worlds ecology by transporting water from the oceans to the Earth�s land surfaces and generating 1.4 trillion tonnes of rainfall every day. Felicity Aston takes a look at how clouds capture and store liquid water in the skies with an experiment to try and weigh a cloud. Andy Torbet tries to measure the forces that keep clouds afloat by parachuting through the turbulent and potentially dangerous air that is around one. Chris Van Tulleken completes the team�s examination of clouds by trying to find out if some clouds are alive and as a consequence are more likely to form rain than others.

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Documentary