Pluto. Pluto and it's moon Charon are close in size.
More Science Trivia
The Kangaroo And The Emu. The kangaroo is the national animal of Australia.
Malaria. Malaria is a an infectious disease transmitted by the bite of the Anopheles mosquito.
10. The U.S. Metric Board was abandoned in 1982.
Dog. The "dog days of summer" are named after Sirius, which is the "Dog Star".
Fossil Record. The earth's fossil record provides information about evolution.
Rock Of Gibraltar. Gibraltar, one of Great Britain's last strongholds in the Mediterranean, would like to revert to Spanish governorship.