The first human x-ray taken by Wilhelm Roentgen in 1896, for his efforts Roentgen was the recipient of the first Nobel Prize for Physics in 1901. The image is of his wife's hand.
Times Square in 1922.
The Dalai Lama at age 2 in 1937.
The dedication of the Washington Monument in 1885.
The first photo of the Earth from the moon taken by Lunar Orbiter in 1966.