Template:Are You Sure/April 16

• ... that a United States Air Force Mark 15 nuclear bomb remains lost somewhere in the waters off Tybee Island near Savannah, Georgia, following a mid-air collision on February 5, 1958?

• ... that mathematician and inventor John Hadley developed ways to make precision aspheric and parabolic objective mirrors for reflecting telescopes, and that in 1721 Hadley showed the first parabolic Newtonian telescope to the Royal Society, the telescope having a 6-inch-diameter (150 mm) primary mirror, comparing favorably with the large aerial refracting telescopes of the day?

• ... that meteorologist Edward Lorenz's discovery of deterministic chaos "profoundly influenced a wide range of basic sciences and brought about one of the most dramatic changes in mankind’s view of nature since Sir Isaac Newton," according to the committee that awarded Lorenz the 1991 Kyoto Prize for basic sciences in the field of earth and planetary sciences?