Notebook
- Space
50 years ago, the United States and Soviet Union joined forces for science
In 1972, U.S. and Soviet leaders agreed to work together on science. Now, Russia’s war in Ukraine is straining that decades-long partnership.
- Space
50 years ago, scientists had hints of a planet beyond Pluto
In 1972, calculations from Halley’s comet offered evidence of another planet. Today’s astronomers are still searching for a Planet Nine.
- Psychology
Latin America defies cultural theories based on East-West comparisons
Theories for how people think in individualist versus collectivist nations stem from East-West comparisons. Latin America challenges those theories.
- Health & Medicine
50 years ago, scientists were seeking the cause of psoriasis
In the 1970s, scientists found a link between a chemical messenger and psoriasis, a complex inflammatory skin disorder.
