Let's say you were sent back in time to a random era and needed to reproduce the most important scientific discoveries/inventions of that time to advance humanity's progress as quickly as possible. To help with this task, you were allowed to bring a single book along with you: which would you choose?
For example, if you were sent to:
– the Bronze age, you'd want to know how to smelt iron
– the 1600s, you'd want to know how to assemble a steam engine
– the 1910s, you'd want to know how to make fertilizer
– the 1920s, you'd want to know how to discover penicillin
Basically, this book would ideally have a short yet detailed description for the recreation of each of human civilization's most useful scientific discoveries and inventions.
by BlueFoxRedTulip