
2015
The longest-reigning British monarch. Queen Elizabeth II passed Queen Victoria to become Britain's longest-reigning monarch.
Wikipedia: Elizabeth IIPhoto: Donald McKague / Wikimedia Commons (Public domain)
5 moments from 1839 to 2015: discovery, creativity and courage, each with a source to read more.
5 moments

2015
Photo: Donald McKague / Wikimedia Commons (Public domain)

1839
John Herschel made the first photograph on a glass plate, of an old telescope.
Photo: W. Ward / Wikimedia Commons (Public domain)

1892
Edward Barnard spotted Amalthea, a small moon of Jupiter, the last moon found by looking through a telescope.
Wikipedia: Amalthea (moon)Wikipedia: Edward Emerson Barnard
Photo: NASA / JPL / Wikimedia Commons (Public domain)

1940
George Stibitz used a computer in New York from a terminal in New Hampshire, the first remote use of a computer.
Photo: Ascended Dreamer / Wikimedia Commons (CC BY-SA 4.0)

1971
John Lennon released Imagine, with its title song about a world living in peace.
Wikipedia: Imagine (John Lennon album)Wikipedia: John Lennon
Photo: Bob Gruen; Distributed by Capitol Records / Wikimedia Commons (Public domain)
Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.