Add Yahoo as a preferred source to see more of our stories on Google. The tops of three coniferous trees poke out from the bottom left, as an upward view of the night sky is lit with vibrant shades of ...

Carbon dioxide released through the burning of fossil fuels is cooling the upper atmosphere, says a group of physicists who believe that a coherent pattern of global climate change in Earth's upper ...

An Australian-built spacecraft will be launched from the International Space Station for the first time next year, as researchers from three Australian universities get ready to make history. The ...

An upper layer of Earth's atmosphere recently collapsed in an unexpectedly large contraction, the sheer size of which has scientists scratching their heads, NASA announced Thursday. The layer of gas ...

Scientists have discovered yet another enigma about our planet: the thermosphere has undergone serious shrinkage. The thermosphere is the largest portion of the Earth’s atmosphere and is the ...

When the sun is relatively inactive — as it has been in recent years — the outermost layer of Earth's atmosphere cools dramatically, new observations find. The results could help scientists better ...