Did you know? Pop. of Tehran, Iran (8.15 million people) is about as big as Pop. of Shenyang, China (8.11 million people)
Speed of a bolt of lightning (350,000 km/h)
/fact/speed-of-a-bolt-of-lightning
Link
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.