The total number of exoplanets discovered to date totals 5,288. Among them are a host of rocky, Earth-like exoplanets but…
Noctilucent clouds were once thought to be a fairly modern phenomenon. A team of researcher have recently calculated that Earth…
NASA's EPIC camera aboard NOAA's DSCOVR spacecraft solves decades old mystery that stymied Carl Sagan. Mysterious flashes are mysterious no…
[/caption] Roughly 2.4 billion years ago, Earth's atmosphere underwent a huge change known as the "Great Oxidation Event". This switch…