Mars Has Rare Iridescent “Mother-of-Pearl” Clouds NASA’s Curiosity rover has photographed rare iridescent clouds high above Mars, where frozen carbon dioxide i

Mars Has Rare Iridescent “Mother-of-Pearl” Clouds NASA’s Curiosity rover has photographed rare iridescent clouds high above Mars, where frozen carbon dioxide ice scatters sunlight into subtle rainbow-like colors [📷](https://pbs.twimg.com/media/HS5BtokWAAAFZrd.jpg) [📷](https://pbs.twimg.com/medi…