If Estimated population of Amur Leopard (Russia and China) (103 individuals) was a standard unit ...
Number of airports in the world (41,800 )...more would be 400 x Estimated population of Amur Leopard (Russia and China)
Estimate of population of Sumatran Elephant (2,600 individuals)...more would be 25 x Estimated population of Amur Leopard (Russia and China)
Number of seats in La Scala opera house, Milan (2,030 )...more would be 20 x Estimated population of Amur Leopard (Russia and China)
Number of passengers on an Underground train on London's Central Line (1,047 )...more would be 10 x Estimated population of Amur Leopard (Russia and China)
Number of passengers on an Airbus A380 airliner (typical configuration) (525 )...more would be 5 x Estimated population of Amur Leopard (Russia and China)
Number of passengers on a Boeing 747-400 airliner (maximum capacity) (524 )...more would be 5 x Estimated population of Amur Leopard (Russia and China)
Number of airports in China (507 )...more would be 5 x Estimated population of Amur Leopard (Russia and China)
Number of passengers on a Boeing 747-400 airliner (typical configuration) (416 )...more would be 4 x Estimated population of Amur Leopard (Russia and China)
Number of skyscrapers in Shenzhen (>150m tall) (410 )...more would be 4 x Estimated population of Amur Leopard (Russia and China)
Number of bones in the human body (206 )...more would be 2 x Estimated population of Amur Leopard (Russia and China)
Number of airports in Israel (42 )...more would be 2/5 of Estimated population of Amur Leopard (Russia and China)
Is That A Big Number? - The Book
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
