From feather to cotton: 'designed' sky surprises residents Unusual cloud shapes caught the attention and aroused the curiosity of residents of the Campinas (SP) region this Wednesday morning (10). The meteorological phenomenon drew figures in the sky that resembled feathers and cotton flakes. According to meteorologist Bruno Bainy, from the Center for Meteorological and Climatic Research Applied to Agriculture (Cepagri) at Unicamp, the feather-like cloud is formed by super-cooled water droplets, at temperatures below zero. According to the expert, when this water freezes, ice crystals appear, responsible for the characteristic shape. 📲 Join the g1 Campinas channel on WhatsApp Another type that stood out was the one that resembles small sheep or scattered cotton flakes. The technical name for these clouds is altocumulus. They form at an altitude of around 5,000 meters and, because they are more swollen and wavy, they end up earning these popular nicknames. A feather-shaped cloud catches the attention of residents of the Campinas region, this Wednesday morning (10). Jeff Oliveira VIDEOS: everything about Campinas and the region See more news about the region on g1 Campinas