It seems that not all April Fool's jokes are total.
Like one man said, in every joke is a grain of truth.
Continuing on the theme of space exploration, for 2008, Google went with "Virgle," an imaginary collaboration between Virgin founder Richard Branson and Google founders Larry Page and Sergey Brin.
The program would theoretically colonize Mars within 100 years, while traveling on a ship controlled by a super computer involving "Holistic Artificial Language interface visually mediated by a glowing red light."
Both Google and Virgin do have a non-April Fool's interest in space. Google is the sponsor of the Google Lunar X Prize, while Virgin Galactic hopes to sell flights on sub-orbital space tours.