Maureen Clemmons used Egypt’s historical clues to form the theory that pyramids were built using kites. To help test it, a team from Caltech raised a 15-foot, 6,900 lb. obelisk using only a kite, pulley system, and support frame. It only took 25 seconds to lift it. Source
Only one among us kept his Spartan reserve. Only he. Only our king. 300 (2006)
"Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring — not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive… If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds."
— Carl Sagan - Pale Blue Dot: A Vision of the Human Future in Space (Chapter 21, p.371 )