Heidi Hammel quotes and aphorisms about how Heidi Hammel ,, We need to be very thoughtful about how we propose to spend the money that NASA does have for space... Heidi Hammel ,, When I was in college, I didn't like physics a lot, and I really wasn't very good at physics. And t... Heidi Hammel ,, Scientists normally like to do experiments. You know, they like to mix this with that and see what ... Heidi Hammel