A Soviet station, North Pole-1, becomes the first scientific research settlement to operate on the drift ice of the Arctic Ocean. Date: May 21, 1937 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1937 📅 On This Day (Today)
The Canadian National War Memorial is unveiled by King George VI and Queen Elizabeth in Ottawa, Ontario, Canada. Date: May 21, 1939 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1939 📅 On This Day (Today)
Physicist Louis Slotin is fatally irradiated in a criticality incident during an experiment with the demon core at Los Alamos National Laboratory. Date: May 21, 1946 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1946 📅 On This Day (Today)
The opening of the Ninth Street Show, otherwise known as the 9th Street Art Exhibition: A gathering of a number of notable artists, and the stepping-out of the post war New York avant-garde, collectively known as the New York School. Date: May 21, 1951 Read more on Wikipedia → 📅 Other events on May 21…
American civil rights movement: Alabama Governor John Malcolm Patterson declares martial law in an attempt to restore order after race riots break out. Date: May 21, 1961 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1961 📅 On This Day (Today)
The Ulster Volunteer Force declares war on the Irish Republican Army in Northern Ireland. Date: May 21, 1966 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1966 📅 On This Day (Today)
Civil unrest in Rosario, Argentina, known as Rosariazo, following the death of a 15-year-old student. Date: May 21, 1969 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1969 📅 On This Day (Today)
Michelangelo's Pietà in St. Peter's Basilica in Rome is damaged by a vandal, the mentally disturbed Hungarian geologist Laszlo Toth. Date: May 21, 1972 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1972 📅 On This Day (Today)
Twenty-nine people are killed in the Yuba City bus disaster in Martinez, California. Date: May 21, 1976 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1976 📅 On This Day (Today)
White Night riots in San Francisco following the manslaughter conviction of Dan White for the assassinations of George Moscone and Harvey Milk. Date: May 21, 1979 Read more on Wikipedia → 📅 Other events on May 21 📅 Events on this day in 1979 📅 On This Day (Today)