Today is …
1837: Birth of Sadi Carnot, engineer who developed some of the foundational principles in thermodynamics.[David Harris’ Science News]
1909: The ship “Arapahoe” was the first to use the international distress signal S.O.S.
1877: Asaph Hall discovered the two moons of Mars, calledd Phobos and Deimos
I even knew about 2 of these.