The World
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.[n 5]
_Timeline_
1932: Department of Psychotronics is founded.
1945: See IID-001
1946-1990: [AWAITING DECLASSIFICATION]
1991: The Soviet Union collapses.
1992: G.R.U. is founded. Remaining branches of the Department of Psychotronics are absorbed as the Psychotronics Division.