Carl Sagan was an American astronomer, astrophysicist, cosmologist, and author. He published more than 600 scientific articles and about 20 books. He had a lot to say! Below is one of my favorite quotes.
And speaking of books,
Please don't forget to download the FREE chapter book for 7-11 year olds
from my website at http://dr-rhia.com/blog
Also, please Stumble this post (red button below) or share any way you can.