Template:Are You Sure/October 12

• ... that astronomer, lens-maker, and scientist Geminiano Montanari (1 June 1633 – 13 October 1687) taught astronomy at the observatory of Panzano, near Modena, where one of his duties was to compile an astrological almanac; and that he did so in 1665, but perpetrated a deliberate hoax by writing the almanac entirely at random, to show that predictions made by chance were as likely to be fulfilled as those made by astrology?