Heidi Hammel quotes and aphorisms about very Heidi Hammel ,, We need to be very thoughtful about how we propose to spend the money that NASA does have for space... Heidi Hammel 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 ,, When Hubble was launched, it became clear very shortly thereafter that there was a problem with the... Heidi Hammel Heidi Hammel Heidi Hammel ,, It's very clear that global climate change is occurring on earth, but it's also been very clear tha...