April 25th observes World Penguin Day as well as DNA Day.
Kathmandu, Nepal, was devastated by a major earthquake.
Romania and Bulgaria signed the European Union's Treaty of Accession, the last step to joining the Union.
Nicaragua elected its first-ever female President, Violeta Chamorro.
The Discovery Space Shuttle deployed the Hubble Space Telescope into low-Earth orbit.
Germany banned the denial of Nazi genocide against Jewish people during the Holocaust.
Bell Labs demonstrated the first practical silicon solar cell in New Jersey, US.
Francis Crick & James Watson's discovery of the double-helix structure of DNA was formally announced.
President Harry Truman opened the two-lane White House bowling alley.
Porsche was officially added to the commercial register in Germany.
New York state became the first to require license plates on automobiles.
The Thornton Affair, a skirmish between American and Mexican soldiers in Texas, started a chain of events that led to the Mexican-American War.
A highwayman, Nicolas Pelletier, was the first man to be executed by the guillotine in Paris, France.
The Chongzhen Emperor died by suicide during a peasant rebellion.
The Peloponnesian war came to an end when Admiral Lysander and his Spartan armies defeated their Athenian foes.
