AdvertisementSnowflake Shapes Shine Under The MicroscopeOctober 26, 2010Richard KnoxfacebookEmailA snowflake from Kiruna Sweden. Large, well-formed crystals like this one, which is between 2 and 5 mm, usually form when the temperature is around -15 degrees Celsius. A special photo-microscope and colored lights were used to capture the image. (Lenart Nilsson Award)