Ohio State University geologists and their colleagues have uncovered evidence of when Earth may have first supported an oxygen-rich atmosphere similar to the one we breathe today.

Ohio State University geologists and their colleagues have uncovered evidence of when Earth may have first supported an oxygen-rich atmosphere similar to the one we breathe today.

A NASA satellite has captured the first occurrence this summer of mysterious iridescent polar clouds that form 50 miles above Earth's surface.

Scientists from NOAA’s Earth System Research Lab will be among 400 researchers in Costa Rica this summer to probe one of the most complex and least observed regions of Earth’s atmosphere during the rainy season. Based in San Jose, Costa Rica, the NASA-led field study will shed light on key processes related to climate change, the stratospheric ozone layer, and global chemistry. The study runs from July 2 through August 15.