1947 in science

iron meteorite that fell in 1947 on the Sikhote-Alin Mountains in eastern Siberia

set of research ethics principles for human experimentation

supernova remnant in the constellation Cassiopeia

type of nuclear bomb that uses a small amount of fusion fuel to increase the rate, and thus yield, of a fission reaction

research expedition by Thor Heyerdahl

overview of natural science-related events during the year of 1947

20th-century total solar eclipse

20th-century annular solar eclipse