Today
: Important things
1930 – The dwarf planet Pluto is officially named.
1956 – The polio vaccine developed made available
1956 – A doctor in Japan reports an "epidemic of
an unknown disease of the central nervous system",
marking the official discovery of Minamata disease.
1999 – Body of British climber George Mallory found on
Mount Everest, 75 years after his disappearance in 1924.
2009 – Same-sex marriage is legalized in Sweden.