Six Degrees
The Infinite Monkey Cage
00:00
The Six Degrees of Separation
Simon Tisdall: It's worth exploring actually mathematically this exponentiation, isn't it? He says if you're going backwards in time rather than across space at the same moment, who do you know who you're actually related to in the past? "It's a vast number of people. We have two parents, four grandparents, eight great grandparents," he says.
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