The air - it’s not something we think about ... there was much more carbon dioxide but no oxygen in the early atmosphere. The composition of the atmosphere has changed over time, and is changing ...

The ice-giant planet Uranus, which travels around the sun tipped on its side, is a weird and mysterious world. Now, in an ...

In turn, life influences the chemical composition of the atmosphere in both beneficial ... Boulder is arguably one of the world’s centers in the fields of Atmospheric Chemistry & Air Quality Research, ...

These particles were initially composed of Fe-Ni metal but during atmospheric entry they oxidized to form Fe-oxide minerals. Their extent of oxidation provides insights into the composition of the ...