2 things science and human progress accomplished on this date.
1858
Darwin and Wallace reveal natural selection
Papers by Charles Darwin and Alfred Russel Wallace were read together to the Linnean Society in London, laying out how living things change over generations through natural selection. The quiet meeting introduced one of the most powerful ideas in all of biology.
After a seven-year voyage, NASA's Cassini spacecraft threaded a gap in Saturn's rings and settled into orbit, the first craft ever to circle the ringed planet. It spent 13 years studying Saturn, its glowing rings, and its many moons.