See also: 1999 in science, other events of 2000, 2001 in science, and the list of years in science.
Astronomy and space exploration April 7 - Mars Odyssey is launched. Biology The yeast Saccharomyces cerevisiae's genome is sequenced. Awards Nobel Prize Physics - Zhores Ivanovich Alferov, Herbert Kroemer, Jack S Kilby Chemistry - Alan J Heeger, Alan G MacDiarmid, Hideki Shirakawa Medicine - Arvid Carlsson, Paul Greengard, Eric R Kandel Wollaston Medal for Geology: William Sefton Fyfe Births Deaths May 19 - Yevgeny Khrunov, cosmonaut September 20 - Gherman Titov, cosmonaut
Deaths May 19 - Yevgeny Khrunov, cosmonaut September 20 - Gherman Titov, cosmonaut