I have to hand it to BBC News, their headline of “Tiny rock excites astrochemists” amused me so much, I just had to take a look at the story.
It concerns a micrometeorite dubbed MM04 — a 150 micron basaltic achondritic micrometeorite to be precise. The tiny grain dates back to the formation of the solar system, and apparently has a chemical composition unlike anything previously seen. Interesting indeed. The news article doesn’t go into details, though apparently the paper’s been published in PNAS. I may have to go looking for that…
I found a picture of if courtesy of Universe Today!