Strange "rainbow clouds" that look like a colorful portal to another dimension have recently appeared across northern skies. These nacreous clouds, also known as polar stratospheric clouds, are one of ...

NASA's Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite was in the right place at the right time at the beginning of this year. On Jan. 4, while flying past the ...

Ocean, cloud and sky brood before the viewer, bathed in an almost heavenly light, forging a romantic intensity that is punctuated by the working aspects of the setting: seagoing vessels, jetties and ...

Arctic observers got a rare festive treat when rainbow-colored clouds appeared in the skies. So-called polar stratospheric clouds were seen over Norway, Sweden, Finland, Alaska, and Scotland. Some saw ...

Scientists have sussed out a new source for the seeds of clouds. When the stratospheric layer of Earth’s atmosphere dips a toe into the underlying troposphere, the resulting chemical mixture becomes a ...