Although scientists have long considered oxygen a sign that life exists on an alien planet, new research suggests the element could be produced without it.
Red dwarf stars may be able to support habitable exoplanets after all -- through complex tidal interactions between star and planet, global magnetic fields could evolve, protecting hypothetical life forms from the red dwarfs' ferocious nature.
Our solar system has some prime locations (besides Earth) for alien life.
After surveying some promising galactic candidates, an astronomer has concluded that there is little to no evidence for any super-advanced alien civilizations in our local universe.
As astronomical techniques become more advanced, a team of astrophysicists think they will be able to not only detect the signatures of alien life in exoplanetary atmospheres, but also track its relentless spread throughout the galaxy.
On Monday, famed theoretical physicist Stephen Hawking announced the launch of a new $100 million effort to track down an alien civilization within the next decade.
A rainbow-like halo surrounded the sun over Mexico City on Thursday, an optical phenomenon that triggered a social media frenzy.
If alien life does exist, scientists aren't sure what it would look like, but one cosmologists says such extraterrestrial creatures will be big — nearly 660 lbs. (314 kilograms), says a cosmologist who bases the estimate on statistics.
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