Skeptophilia

Ever heard of Antichthon ?  Sometimes called "Counter-Earth," Antichthon is a hypothesized (now known to be nonexistent) planet in...

It's interesting how the approach to science has changed in the last four centuries. It's easy to have the (mistaken) impression tha...

A long-standing unsolved puzzle in physics is the three-body problem , which despite its name is not about a ménage-à-trois .  It has to do ...

I remember the first time I ran into the concept that the Earth's relatively circular orbit might not be universal amongst the planets o...