Soon DuPont scientists realized that bioderived propanediol could also be used as an ingredient in cosmetics and products for de-icing aircraft.

Hence the cosines and versed sines of zenith distances are respectively equal to the sines and coversed sines of the corresponding angular elevations.

Mosaic of Olympus Mons on Mars. The supervolcano is nearly 600 kilometers wide at the base and 25 kilometers high and is capped by a crater 65 kilometers in diameter. It is about five times larger than the most massive volcanic cone on earth, Mauna Loa in Hawaii.

I don't really know him well, since he's so shy and retiring.