There is much that science doesn't understand, many mysteries still to be resolved. In a Universe tens of billions of light-years across and some ten or fifteen billion years old, this may be the case forever. We are constantly stumbling on new surprises
Carl SaganAbout author
- Author's profession: Scientist, Physicist
- Nationality: american
- Born: November 9, 1934
- Died: December 20, 1996