The Thin Layer on Top audio documentary cover
Science 24 min

The Thin Layer on Top

You and a daffodil are close. That is the small distance.

Everything we think of as life occupies one small branch of a tree whose other two branches are entirely microbial. The genetic distance between those microbial domains is greater than the distance between a human and a daffodil. The visible world is the exception, not the rule.

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microbiology tree of life evolution archaea bacteria genetics biomass taxonomy carl woese phylogenetics cell biology biology deep time symbiosis science history

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