If Time since start of building of the Colosseum (1,950 y) was a standard unit ...
Age of earliest mammoth fossils (4.8 million y)...more would be 2500 x Time since start of building of the Colosseum
Time since the birth of Omar Khayyam (976 y)...more would be 1/2 of Time since start of building of the Colosseum
Time since the birth of Marco Polo (770 y)...more would be 2/5 of Time since start of building of the Colosseum
Time since the publication of Copernicus's sun-centred model of the solar system (481 y)...more would be 1/4 of Time since start of building of the Colosseum
Time since Charles Lindbergh first flew across the Atlantic (97 y)...more would be 1/20 of Time since start of building of the Colosseum
Time since Concorde Supersonic Airliner entered service (48 y)...more would be 1/40 of Time since start of building of the Colosseum
Read all about it!
Is That a Big Number? - the book - is now available from all good booksellers.
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