Dark comets …

… sound damn scary.

From KurzweilAI.net —

‘Dark’ comets may pose threat to Earth

New Scientist Space, Feb. 11, 2009 Dark comets may be prowling the solar system, posing a deadly threat to Earth. They are formed when reflective water ice has evaporated away, leaving behind an organic crust that only reflects a small fraction of light.   Read Original Article>>