1973 in science

long-period comet

catalogue of galaxies visible from the northern hemisphere

psychological experiment

four data sets with the same descriptive statistics, yet very different distributions

solar eclipse

thought experiment by philosopher Hilary Putnam

project to find planet-crossing asteroids, related inner-belt asteroids, and comets

overview of natural science-related events during the year of 1973

thumb|Example of completed metoidioplasty including neourethra and scrotoplasty, two years post-operation

report by James Lighthill et al. that evaluated the state of artificial intelligence research in the 1970s

20th-century annular solar eclipse

20th-century annular solar eclipse

The '''Acali expedition (or Acali experiment or the Sex Raft''') was a 1973 social experiment that aimed to investigate interpersonal relationships in conditions of limited space and social isolation. The experiment was conceived by Mexican anthropologist Santiago Genovés, who had previously been a crew member of Thor Heyerdahl's Ra expedition. The participants showed a restraint towards aggression, which frustrated Genovés and led him to start to try to create conflict, and at one point he took command of the float. Despite these attempts, the group remained peaceful.

planum on Mars