The discovery of the smallest extrasolar planet (about seven-and-a-half times the mass of Earth) was announced today. An artist's conception of this world is pictured on the left. It's the first rocky world found to be orbiting a star similar to our sun, and as such "it's like Earth's bigger cousin," declared astronomer Paul Butler. Read more here(1).

1. http://www.space.com/scienceastronomy/050613_super_earth.html