On January 8, a gaur bull named Noah was born, the first animal of an endangered species to be successfully cloned.
January 13 - an earthquake with a magnitude of 7.6 occurs in El Salvador, as a result of which more than 800 people die, and thousands more remain homeless.
On January 15, the "Wikipedia" project was launched.
January 26 - A 7.9-magnitude earthquake strikes Gujarat, India, killing about 20,000 people.
February 12 - The NEAR Shoemaker spacecraft lands on 433 Eros, becoming the first spacecraft to land on an asteroid.
February 13 - an earthquake with a magnitude of 6.6 occurs in El Salvador, resulting in the death of at least 400 people.
March 23 — decommissioning of the Russian orbital station "Mir" through a controlled fall of the station into the waters of the Pacific Ocean.
April 1 - the same-sex marriage law comes into force in the Netherlands. This law legalizes same-sex marriage, which happens for the first time since the reign of the Roman emperor Nero.
April 28 - the Soyuz TM-32 spacecraft takes off from the Baikonur Cosmodrome, carrying the first space tourist - the American Dennis Tito.
May 6 - Space tourist Dennis Tito returns to Earth aboard Soyuz TM-31 (Soyuz TM-32 remains docked to the ISS as a rescue ship).
June 23 - an earthquake with a magnitude of 7.9 on the Richter scale occurs in southern Peru.
On July 2, the world's first autonomous artificial heart was implanted in the body of a patient, namely Robert Tools.
On July 3, near Irkutsk, a Tu-154M passenger plane of the Vladivostok Avia airline, which was flying Yekaterinburg-Irkutsk-Vladivostok, crashed during landing. All 145 people on board died.
August 24 - Microsoft released the Windows XP operating system.
September 11 - the terrorist attack on September 11, 2001 in the United States, as a result of which 2,996 people died.
October 4 - in the Novorossiysk region, a Tu-154 passenger plane of the Sibir airline company, which was flying from Tel Aviv to Novosibirsk, disappears from the radar. The plane fell into the Black Sea, 78 people died. There is a version that the plane was shot down