Today in history

1907: The first Isle of Man Tourist Trophy motorcycle race is held.

1937: Alan Turing submits the proof “On Computable numbers.” The proof was on the conjecture that some mathematical yes-no questions could not ever be answered by computation.

1964: The Palestinian Liberation Organization is founded with Yasser Arafat as its first leader.

1999: After 22 years of restoration work, Leonardo da Vinci’s “The Last Supper” is put back on display in Milan, Italy.