How and when did humans discover there was no air in space?
In: 1574
1643 Torricelli ~~indebted~~ (typo!) invented the barometer (to measure air pressure)
1648 Perier (prompted by his brother in law, Pascal) climbed Mount Puy de Dome with a barometer. Noticed that atmospheric pressure decreased with altitude
1659 von Guericke experimented with the vacuum pump. He concluded that the atmosphere was around the earth in a shell, getting less dense with altitude, and so it must reach a vacuum at some point
1687 Newton put forward his theory of Universal Gravitation
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