In 1987, a team of researchers headed by Edward Anders and Roy Lewis of the University of Chicago reported the discovery of meteorite-embedded diamonds so miniscule that trillions could fit on the head of a pin. Unlike the Smithsonian diamonds, these microscopic crystals contain an isotopic mixture of xenon gas not found on Earth. "It seems necessary to invoke an extra-solar origin for the diamond," the scientists concluded in a paper published in Nature, indicating a birth outside our solar system.
Read full story: http://www.pbs.org/wgbh/nova/space/diamonds-in-the-sky.html
Read full story: http://www.pbs.org/wgbh/nova/space/diamonds-in-the-sky.html