Space is Negative Energy

The great mystery at the heart of the Big Bang is to explain how an entire, fantastically enormous universe of space and energy can materiahse out of nothing. The secret lies in one of the strangest facts about our cosmos. The laws of physics demand the existence of something called "negative energy." To help you get your head around this weird'd but crucial concept, let me draw on a simple analogy Imagine a man wants to build a hill on a flat piece of land. The hill will represent the univ...

 Mercury Sun Walkers

The sun is always just about to rise. Mercury rotates so slowly that you can walk fast enough over its rocky surface to stay ahead of the dawn; and so many people do. Many have made this a way of life. They walk roughly westward, staying always ahead of the stupendous day. Some of them hurry from location to location, pausing to look in cracks they earlier inoculated with bioleaching metallophytes, quickly scraping free any accumulated residues of gold or tungsten or uranium. But most of them...

 Carl Sagan on the Audacity of John F. Kennedy's Moon Miss...

Once upon a time, we soared into the solar system, for a few years. Then we hurried back. why? What happened? What was Apollo really about? The scope and audacity of John Kennedy's May 25th 1961 message to a joint session of Congress on "Urgent National Needs" -- the speech that launched the Apollo program--dazzled me. We would use rockets not yet designed and alloys not yet conceived, navigation and docking shemes not yet devised, in order to send a man to an unknown world--a world not yet...