Did you know? Time since the first passenger steam railway service (199 y) is 2.5 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (80 y)
Maximum length of a tennis racket (737 mm)
/fact/maximum-length-of-a-tennis-racket
Link
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.