New Curiosity rover findings could mean breakthrough in search for signs of life on Mars
New discoveries by NASA's Mars rover Curiosity add to a growing body of evidence supporting the idea that microscopic organisms might once have lived on the red planet — and have some scientists considering the possibility that microbial life might live there still.
Super-Earth exoplanet discovered orbiting a star just 6 light-years from our sun01:29
Could this cosmic interloper be an alien spacecraft? Neil deGrasse Tyson isn’t so sure03:52
'A bumpy ride ahead': Astronomer Martin Rees on humanity's chance of surviving the 21st century03:48
The search for alien life in Nevada05:09
Deep Fakes: How they’re made and how they can be detected04:14
Mount Etna is sliding into the sea. It could be catastrophic02:07