Brilliant Blue Antarctic Clouds Are Appearing Earlier Than Usual
Fed by disintegrating meteors and located 50 miles above ground, Antarctica’s icy blue noctilucent clouds have made their annual appearance over the frozen continent. Scientists say these unusual clouds are arriving earlier than usual, and greenhouse gases are the likely culprit. Noctilucent, or “night-shining,” clouds are Earth’s highest clouds, located in an upper layer of…
