Links for September

Trade, Merchants, and the Lost Cities of the Bronze Age (direct paper link)
Identify specific trade routes listed on Assyrian clay tablets. Figure out the typical distances, based on the cities we know the location of. Infer the location of the cities we don’t. Profit.

Energy Free Cooling through Physics
You can make a material that is transparent to infrared light, but scatters sunlight. This is the opposite behavior of glass, which means you could, in theory, make a “greenhouse” that cools rather than heats, among other applications.

Understanding QFT - Episode 1: How spin was discovered
Great run down of the history of quantum mechanics. Far more detail than the typical 15 minute videos on YouTube.