T
Techno2000
Guest
I’m looking at this from the angle of environmental changes. For every fit/unfit cycle, you’re going to need a corresponding perfect environmental event that made this fit/unfit cycle possible.Now, add up all the slight gradual modifications, plus all the needed environmental pressures to go along with it and one should see that this is an impossible amount of environmental change.Techno2000:![]()
I estimate about 2,739,720,400,000 generations, estimated as below:How many fit/unfit cycles do you estimate it took evolution to go from a microbe to the 10 million different plant and animal species we have today?
Being the sort of person I am, I already had that calculation saved in a spreadsheet since I was interested in the answer a few years back. That averages out to about 900 generations for each base pair in the human genome.
From To Elapsed Generation Time Number of Generations Examples Single celled prokaryote 3.5Ba 2Ba 1.5By 6 hour 2191500000000 E. coli 30 mins Single celled eukaryote 2Ba 500Ma 1.5By 1 day 547875000000 Paramecium 6 hours Simple Multicellular Chordate 500Ma 400Ma 100My 6 months 200000000 Amphioxus 1 month Vertebrate fish 400Ma 350Ma 50My 1 year 50000000 Zebra Fish 4 months Amphibian 350Ma 275Ma 75My 2 years 37500000 Frog 1 year Reptile 275Ma 200Ma 75My 3 years 25000000 Gekko 2 years Mammal 200Ma 70Ma 130My 5 years 26000000 Rat 6 weeks Primate 70Ma 2Ma 68My 10 years 6800000 Macaque 4 years Homo/Human 2Ma Present 2My 20 years 100000 Human 20 years 2739720400000
Last edited: