Earth; Mostly harmless
Geology; some peculiar fjords along the cost of Norway, designed by Slartibartfast
Population; None. The earth was destroyed by the Vogons to make way for a hyperspace bypass
Task; If you happen to visit earth using a time vortex (it has been destroyed, remember), please fly 7.5 laps around it in light speed. Meassure the time (including relativistic effects). Compare your results with that of your friend (who you conveniently dropped off in Islington). If confused, have a pangalactic gargleblaster and most importantly, DONT PANIC! Once you have restored normality, send the answer via the Sub-Etha to President Zarniwoop, Megadodo Publications, Ursa Minor Beta.
This cache is published with special permission from the council of Magrathea