US defense officials have said the Pentagon's recent effort to investigate such sightings has resulted in hundreds of new reports being investigated with most remaining unexplained.
Extraterrestrial life
A possible super-hot sea of melted rock, unique in the solar system, could harbor secrets, weird mechanisms for forming planets & even recipes for exotic alien life
A new study shows that any living critters hanging out on the Red Planet are probably taking refuge just below the surface
Scientists believe the signals come from collapsed stars - but some have suggested they might be evidence of extraterrestrial civilisations
Astronomers are discovering more of the billions they think are out there
The rover's tweet
As well as looking for microbial life, the rover will also bring back samples of Martian geology
There are billions of exoplanets in the Milky Way galaxy, but how many of those are potentially habitable?
"I was like, ‘Is there a lab somewhere where we’re keeping the alien specimens and space ships?'"
The study suggests that we should start investigating worlds larger than the Earth whose atmospheres are dominated by hydrogen