We’ll be at the Cedar Valley Rocks & Minerals Society Gem, Mineral and Fossil Show this Saturday and Sunday, March 19-20, at the Hawkeye Downs Expo Center in Cedar Rapids.  The theme of the show this year is Treasures From Iowa’s Ice Age.  We’ll be showing off our traveling trunk of sloth bone-prototypes from the UI Engineering Design and Prototyping Center, and speaking at 10:00 AM  Saturday and 2:30 PM  Sunday.   For more details