Dog days Dog days The dog days or are the hot, sultry days of summer. They were historically the period following the heliacal rising of the star system Sirius, which Greek and Roman astrology connected with heat, drought, sudden thunderstorms, lethargy, fever, mad dogs, and bad luck. They are now taken to be the hottest, most uncomfortable part of summer in the Northern Hemisphere. The English name is a calque of the Latin "" (."the puppy days"), itself a calque of the Greek "kynádes hēmérai" (, "dog days"). The Greeks knew the star α Canis Majoris by several names, including Sirius (,
The Sirius Mystery The Sirius Mystery The Sirius Mystery is a non-fiction book by Robert K. G. Temple first published by St. Martin's Press in 1976. Its second, 1998, edition is called The Sirius Mystery: New Scientific Evidence of Alien Contact 5,000 Years Ago. The book presents the hypothesis that the Dogon people of Mali, in west Africa, preserve a tradition of contact with intelligent extraterrestrial beings from the Sirius star system. These beings, who are hypothesized to have taught the arts of civilization to humans, are claimed in the book to have originated the systems of the Pharaohs of Egypt, the mythology