Article of the Day

Self-Replicating Spacecraft A self-replicating spacecraft is an entity that would, in theory, be able to travel to a neighboring star-system and extract raw materials from celestial bodies to create replicas of itself. Such replicas could then be sent to other star systems, repeating the process in an exponentially increasing pattern. Using relatively conventional theoretical methods of interstellar travel, how long would it take for self-replicating spacecrafts to spread throughout the Milky Way Galaxy? More... Discuss

Word of the Day

Play gyrate discuss
Definition:	(verb) Revolve quickly and repeatedly around one's own axis.
Synonyms:	spin, reel, whirl
Usage:	The airplane gyrated about in the sky in a most alarming fashion.

Quote of the Day

Here, sir, the people govern; here they act by their immediate representatives. Alexander Hamilton (1755-1804) Discuss

Today in History

The Battle of Bunker Hill (1775) Early in the American Revolution and soon after the battles of Lexington and Concord, colonial troops laid siege to Boston. When they began occupying hills overlooking the city, newly reinforced British troops attacked. After two failed assaults, a third charge dislodged the Americans, who had run out of gunpowder. Though the British technically won, their unexpectedly heavy casualties were a psychological blow, and American morale soared. On what hill was the battle actually fought—and why? More... Discuss