Table 1

Microbes in humans and on earth in accordance to references [1,2].

  Microbes Humans Factor
On Earth 5 × 1031 6 × 109 ∼1022
Mass (metric tons) 5 × 1016 3 × 108 ∼108
Generation time 30 min 30 years ∼5 × 105
Time on Earth/years 3.5 × 109 4 × 105 ∼104

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