Americapox: The missing plague
Colonisation killed 90% of native Americans through disease. So why did no native plague travel the other way? London, alpacas and smallpox explain it.

90% of the native americans died during the new world colonisation. It was not due to the invaders themselves, but to their plagues.
So why the natives viruses didn’t plagued the old continent too?
Because London, alpacas, smallpox.
Read next
Welcome. Wait, why?
Years of watching science videos have shaped how I think about the world. Starting here, I am going to share the ones that influenced me most.
Helicopters and muscle memory
Flying a helicopter turns out to be much more like riding a bike than driving a car. Torque, counter torque and cyclic explain why.
Detonating purple powder
What happens when a balloon touches unstable nitrogen triiodide powder, filmed at 90,000 frames per second and slower than the speed of sound.