On this day…
April 27, 1981: Xeroz PARC introduces the computer mouse
On this day…
April 26, 1865: Union calvary troopers corner and shoot dead John Wilkes Booth, assassin of President Lincoln, in Virginia.
On this day…
April 25, 1847: The last survivors of the Donner Party are out of the wilderness.
On this day…
April 24, 1704: The first newspaper in the United States, the News-Letter, is published in Boston, Massachusetts.
On this day…
April 16, 1943: Dr. Albert Hofmann discovers the psychedelic effects of LSD.