Age of earliest stone hand axe

Age of earliest stone hand axe (2.6 million y)

/fact/age-of-earliest-stone-hand-axe

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Neat Ratios ...

Age of earliest stone hand axe (2.6 million y)

is 1/200 of Time since the emergence of earliest fish (530 million y)...more
is 1/25 of Time since the extinction of dinosaurs (66 million y)...more
is 1/25 of Time since the end of the Cretaceous geologic period (66 million y)...more
is about as big as Time since the end of the Neogene geologic period (2.58 million y)...more
is 250 x Time since first domestication of cattle (10,500 y)...more
is 250 x Time since first domestication of cats (10,500 y)...more
is 400 x Age of the earliest city (6,500 y)...more
is 500 x Time since the start of the Bronze Age (5,300 y)...more
is 500 x Age of oldest wooden wheel (5,150 y)...more
is 500 x Time since building of Stonehenge (5,120 y)...more
is 500 x Time since the earliest writing (5,100 y)...more
is 1000 x Time since the birth of Pythagoras (2,592 y)...more

If this was a standard unit ...