Events
1975 - Apollo-Soyuz Test Project: An American Apollo and a Soviet Soyuz spacecraft dock with each other in orbit marking the first such link-up between spacecraft from the two nations.
1976 - Viking 1 successfully lands on Mars.
1998 - Biologists report how they sequenced the genome of the bacterium that causes syphilis, Treponema pallidum (above).
Births
1920 - Gordon Gould, inventor of the laser
1955 - Paul Stamets, American mycologist and environmentalist
Deaths
1894 - Josef Hyrtl, Austrian anatomist
1912 - Henri Poincaré, French mathematician
