1895 – Wilhelm Röntgen, a German mechanical engineer and physicist, published a paper detailing his discovery of a new type of radiation, which later will be known as x-rays. And we’re still using them, 121 years later.
1952 – The first transistorized hearing aid was offered for sale by Sonotone Corporation on this day.
1968 –The crew of Apollo 8 entered into orbit around the Moon, becoming the first humans to do so. They performed ten lunar orbits and broadcast live TV pictures.