Nacreous Cloud over NASA Dome, Antarctica. These clouds are formed in the winter polar stratosphere at altitudes metres. Particles within the optically thin clouds cause coloured interference fringes by diffraction.
Are you thinking of going short? These 25 short hairstyles just might convince you and make you want to cut your hair. From curly and straight, to bangs and no bangs - get some fabulous ideas for a short hairstyle.