Time since building of Stonehenge

Time since building of Stonehenge (5,120 y)

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Neat Ratios ...

Time since building of Stonehenge (5,120 y)

  • is 1/500 of Age of earliest stone hand axe (2.6 million y)...more
  • is 1/500 of Time since the end of the Neogene geologic period (2.58 million y)...more
  • is about as big as Age of oldest wooden wheel (5,150 y)...more
  • is about as big as Time since the earliest writing (5,100 y)...more
  • is 2 x Time since the birth of Pythagoras (2,592 y)...more
  • is 2.5 x Time since the birth of Hero of Alexandria (2,012 y)...more
  • is 20 x Time since the birth of Joseph Fourier (254 y)...more
  • is 25 x Time since the birth of Ada Lovelace (207 y)...more
  • is 25 x Time since the birth of mathematician Maria Gaetana Agnesi (204 y)...more
  • is 50 x Time since the birth of chemist Rosalind Franklin (102 y)...more
  • is 100 x Time since first Boeing 747 entering service (52 y)...more
  • is 100 x Time since first email sent (51 y)...more
  • is 100 x Time since the launch of Intel's first microprocessor, the 4004 (51 y)...more

If this was a standard unit ...

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