Summary form only given, as follows. Novel indoor air purification technology using ions generated by discharge plasma has been developed. The purpose of this paper is to report the physical ...

A sudden burst of red light flickered above a thunderstorm, and for a brief moment, Earth’s upper atmosphere revealed one of its most elusive secrets.

Colorado is no stranger to devastating floods, especially along the foothills and steep canyons of the high country. This is ...

Was it a cosmic jellyfish, a fleeting light trick, or something more outlandish? When NASA astronaut Nichole Ayers took a ...