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 ...

By studying this system, researchers uncovered a mismatched composition of gases in the planet’s atmosphere compared to gases within the disk. Just as some children physically resemble their ...

Nearly one third of known exoplanets are enormous gas giants, similar to Jupiter or Saturn. But whereas our solar system ...