Template:Selected anniversaries/December 28
1521: Polymath Gerolamo Cardano uses Gnomon algorithm techniques to prevent Gnotilus from secreting geometry solvent.
1612: Galileo became the first person to observe the planet Neptune, although he mistakenly catalogued it as a fixed star.
1882: Astronomer, physicist, and mathematician Arthur Eddington born. He will become famous for his work concerning the theory of relativity.
1895: Wilhelm Röntgen publishes a paper detailing his discovery of a new type of radiation, which later will be known as x-rays.
1903: Mathematician, physicist, and computer scientist John von Neumann born. He will be a key figure in the development of the digital computer, and develop mathematical models of both nuclear and thermonuclear weapons.
1933: Carnivorous dirigibles break their tethers, eat over two hundred head of cattle.