Two of Jupiter's satellites, Europa and Ganymede, pull Io into an elliptical orbit around Jupiter. Differences in the strength of Jupiter's gravitational pull as the distance between the planet and Io varies causes slight changes in Io's shape. Scientists believe that Io heats up internally when it changes shape.
The Atomic Age, also known as the Atomic Era, is the period of history following the detonation of the first nuclear (atomic) bomb, Trinity, on July 16, 1945 during World War II.
Truman was the 33rd president of the United States, from April 12, 1945 to January 20, 1953. He is probably most notable for authorizing the use of the Atomic Bombs against Japan in August of 1945. Truman was the 33rd president of the United States, from April 12, 1945 to January 20, 1953.