1990s
The 1990s decade covers the period from 1990-1999.

The 1990s were described by Spock as a "strange, violent time" in the history of Earth. Along with bacteriological warfare experiments, genetic engineering spawns the Augments. () After the dissolution of the Soviet Union and the end of the Earth Cold War, the Human "supermen" seize control of large portions of the planet. The devastating Eugenics Wars among those leaders find them defeated and exiled.

In the fields of science, cryonics becomes popular on Earth and space modules are launched. Khan Noonien Singh and his followers are exiled in a sleeper ship. Human scientists discover evidence of past life on Mars and NASA launches the Sojourner, the first vehicle to roam the planet. (; ; )

In the late 1990s, the NASA probe  reaches the Jovian moon Europa and takes detailed images of its surface. ()

In an alternate reality, Chronowerx Industries spearheads the advance of computer technology in this decade. ()

Years

Events 
 During the 1990s, Earth conducts several bacteriological warfare experiments. According to Dr. McCoy, one of their noted experiments produced an infection which resembles those found on the  crewmembers who visited Omega IV. ()

de:1990er
es:Década del 1990
fr:20ème siècle#Années 1990
it:Anni 1990
nl:1990s
sv:1990-talet