For the past six months, physicist Andrew Westphal has been guarding a treasure trove — a priceless collection of comet dust captured by the Stardust spacecraft and brought back to Earth earlier this year. Using techniques Westphal and colleagues developed, UC Berkeley and NASA teams have been carefully cutting pieces of dust out of an aerogel collector and doling them out to eager scientists for study.<br><br><a href='http://www.berkeley.edu/news/media/releases/2006/12/14_stardust.shtml' target='_blank'>http://www.berkeley.edu/news/media/releases/2006/12/14_stardust.shtml</a><br><br>