What Surprised You the Most About the History of Asphalt?

Asphalt is a natural substance, like the wabrea tarpets, that's asphalt. And in germany, you got some old asphalt mines where corporations like doch asphalt would dig. I was kind of shocked at the amount of asphalt in 55 gallon drums that landed with our troops on d day,. But i was even more shocked at the importance notsy germany gave to ask falt for ther war effort, but also for the hall cost.