Top Down/Bottom Up in Biology

Why did the universe get complex? This remarkable panel discussion between three leading biologists is a feast of discoveries and ideas about the nature of life. The focus is on how complex structures develop, in particular the challenges to the traditional view that complexity arises spontaneously from lower level systems (bottom-up). A number of examples of top-down processes are given, suggesting a series of events towards a goal state, an idea taboo in mainstream biology.

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