Positron. A positron is an electron with an opposite, positive charge, which is what makes it anti-matter.
More Science Trivia
Prism. Today it is agreed that light can sometimes behave like waves while at other times it behaves like particles.
Craters. There are approximately 30,000 craters on the moon.
164.79 Earth Years. Methane gives Neptune its blue color.
Maine. Maine sees the first light of the sunrise in America each morning.
Air. The Earth's air is comprised of 78% nitrogen, 21% oxygen and 1% other substances.
Sergi Korelov. Korolev was responsible for the program that launched Sputnik into space in 1957.