Arts & Culture | March 4, 2020. The Amazing Poster Art From the ‘Golden Age’ of Magic. An exhibition at the Art Gallery of Ontario shows how magicians enticed audiences with advertisements of ...

Blue hour is something of a misnomer, as it typically occurs in the 30 to 40 minutes before twilight when the sun is 4 to 6 degrees below the horizon.Red light, with its long wavelength, largely ...