We are not alone. Maybe.
NASA announced that the Mars rover Curiosity found additional evidence to support the theory that microscopic organisms once lived on the red planet. The findings are being hailed as breakthroughs in the realm of astrobiology.
According to scientific papers released on Thursday, Curiosity found a range of carbon-containing compounds in ancient sediment. It also found shifting levels of methane, an organic molecule, in the atmosphere.
“The discovery that methane gas is being released on a seasonal basis from the Martian subsurface means that there are active processes happening… which could include heated reactions between water and rocks, possible biological activity, or some other mechanism,” said Kirsten Siebach, a planetary geologist at Rice University in Houston to NBC News.