These days there seems to be nowhere left to explore, at least on the land area of the Earth. Victims of their very success, the explorers now pretty much stay home.
Carl SaganDemon mean knowledge in Greek, especially about the material world. Science means knowledge in Latin. A jurisdictional dispute is exposed, even if we look no further
Carl SaganExcept in pure mathematics, nothing is known for certain (although much is certainly false).
Carl Sagan