Kari Byron, Tory Belleci and Grant Imahara rank history's greatest inventions, heists and more.
Grant Imahara
Kari Byron
Tory Belleci
6.5 ⭐
2017
5.2 ⭐
8.1 ⭐
2015
7.6 ⭐
2016
7.8 ⭐