Is That A Big Number?

If Time since building of Stonehenge (5,120 y) was a standard unit ...

Age of earliest stone hand axe (2.6 million y)...more would be 500 x Time since building of Stonehenge

Time since the end of the Neogene geologic period (2.58 million y)...more would be 500 x Time since building of Stonehenge

Age of oldest wooden wheel (5,150 y)...more would be about as big as Time since building of Stonehenge

Time since the earliest writing (5,100 y)...more would be about as big as Time since building of Stonehenge

Time since the birth of Pythagoras (2,594 y)...more would be 1/2 of Time since building of Stonehenge

Time since the birth of Hero of Alexandria (2,014 y)...more would be 2/5 of Time since building of Stonehenge

Time since the birth of Joseph Fourier (256 y)...more would be 1/20 of Time since building of Stonehenge

Time since the birth of mathematician Maria Gaetana Agnesi (206 y)...more would be 1/25 of Time since building of Stonehenge

Time since the first iron steamship crossed the English Channel (202 y)...more would be 1/25 of Time since building of Stonehenge

Time since birth of M. C. Escher (126 y)...more would be 1/40 of Time since building of Stonehenge

Time since the birth of chemist Rosalind Franklin (104 y)...more would be 1/50 of Time since building of Stonehenge

Yes, there's now a book based on these numbers. Oxford University Press: July 2018.