One of the many intriguing observations Carl Sagan makes in his bestselling 1995 book The Demon-Haunted World: Science as a Candle in the Da...

I had a tough time sleeping last night, and it wasn’t because my lovely and demented—er, devoted—future wife, Some Gal, was fidgety; I think...

Almost twenty years ago, the spacecraft Voyager 1 , having flown past the distant boundary of the solar system, was made to turn around in ...