TIL the height of the Eiffel Tower varies by up to 15 cm (6 in) depending on the temperature (engineering.purdue.edu)
Atmospheric water harvesting: can we get water out of thin air? (engineering.purdue.edu)
Earth’s atmosphere holds six times more fresh water than all of its rivers combined. So is it possible to harvest that water, in areas where people have no other fresh water source? Purdue University researchers have crunched the numbers, and have the data to show which atmospheric water harvesting methods work best in...
