The year 2000 in science and technology consisted of many events, some of which are included below.

Astronomy and space exploration

* May 3 - A rare conjunction occurs on the New Moon including all seven of the traditional celestial bodies known from ancient times up until 1781 with the discovery of Uranus. The May 2000 conjunction consisted of: the Sun and Moon, Mercury, Venus, Mars, Jupiter, and Saturn.

Biology

*December 14, the full genome sequence of the flowering plant Arabidopsis thaliana is published in Nature.

Awards

* Nobel Prizes
** Physics - Zhores Ivanovich Alferov, Herbert Kroemer, Jack Kilby
** Chemistry - Alan J Heeger, Alan G MacDiarmid, Hideki Shirakawa
** Medicine - Arvid Carlsson, Paul Greengard, Eric R. Kandel
* Turing Award: Andrew Yao
* Wollaston Medal for Geology: William Sefton Fyfe

Births

Deaths

* May 19 - Yevgeny Khrunov (b. 1933), cosmonaut
* September 20 - Gherman Titov (b. 1935), cosmonaut
* October 4 - Michael Smith (b. 1932, chemist, 1993 Nobel Prize winner

Science
Category:2000s in science