There Could Be Alien, Mars-Sized Planets Lurking Beyond Pluto

See the moon meet up with Mercury, Venus and Mars in the early morning sky on Jan. 9

25 years ago, a NASA spacecraft on its way to Mars orbit broke into pieces because someone used imperial instead of metric units.

In 1969, Nixon appointed a Space Task Group which presented recommendations including building an Earth-orbiting space station, a lunar-orbiting space station, a base on the lunar surface, and a human expedition to Mars. They were too expensive, so Nixon directed NASA to build the Space Shuttle