How to invent everything : a survival guide for the stranded time traveler

"What would you do if you had a time machine that took you hundreds or thousands of years into the past . . . and then broke? How would you survive? Could you improve on civilization's original timeline? And how hard would it be to domesticate a giant wombat? In How to Invent Everything, bestselling author and time-travel enthusiast Ryan North answers all these questions so you don't have to. This guide contains all the science, engineering, math...