?Ultra-Primitive? Particles Found in Comet Dust

Washington, D.C.?Dust samples collected by high-flying aircraft in the upper atmosphere have yielded an unexpectedly rich trove of relicts from the ancient cosmos, report scientists from the Carnegie Institution.
The stratospheric dust includes minute grains that likely formed inside stars that lived and died long before the birth of our sun, as well as material from [...]

Full story at http://spacefellowship.com/2009/11/03/ultra-primitive-particles-found-in-comet-dust/