The explanations, particularly in the thorny field of quantum physics, are excellent, and the selection of subject matter skilfully winnows a vast field.

ECONOMIST: History of science: Time's arrow | The

The site also links to a wide selection of Halloween-related web pages, covering All Hallows' Eve subject matter from ghost stories to costumes to "mystic games" like a virtual Ouija board and a tarot card reading.

CNN: Halloween spirits are on The Web