Episode Synopsis "Science futures at the Cambridge Science Festival clip 3"

Clip 3 The last 50 years represent the first time in history in which the developed world have had access to abundant calories, so it’s unsurprising that obesity is common. What’s more puzzling is that there are still lots of lean people. Professor Stephen O’Rahilly explains fundamental biological processes that regulate energy balance and how these interacted with evolutionary forces over many millennia.

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