Humans Are Making These Mysterious Clouds More Common
An otherworldly cloud phenomena found high in Earth’s atmosphere is becoming more visible due to our greenhouse gas emissions, according to a new study published in Geophysical Research Letters this month. Noctilucent, or night-shining, clouds look like wispy shimmering sky webs formed from ice-crystals. Unlike most clouds that appear, at most, approximately four miles (six km)…