1924

Events

• Harry Grindell Matthews attempts to demonstrate his "death ray" to the War Office.

• U.S. Army pilots complete the first aerial circumnavigation of the globe, taking 175 days and 74 stops.

• Astronomer Edwin Hubble announces that Andromeda, previously believed to be a nebula, is actually another galaxy.
  He adds his theory that the Milky Way is only one of many such galaxies in the universe.

Timeline
1923	1924	1925