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

And in fact, before plants appeared on Earth, scientists think there was much more carbon dioxide but no oxygen in the early atmosphere. The composition of the atmosphere has changed over time ...

We know that the composition of the Earth's atmosphere has changed over time, and that it is changing now. It is important for us to understand what effect climate change might have on life on our ...

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 ...