Even though humans are yet to find concrete evidence of alien life, space experts believe that extraterrestrials could be thriving somewhere in distant planets.
Avi Loeb, who suggested the alien origin of Oumuamua, was the longest-serving chair of astronomy at Harvard and has published hundreds of pioneering papers.
NASA JPL and California Institute of Technology scientists suggested that most of the alien civilizations that ever dotted our galaxy have probably killed themselves off already
Based on data gathered by NASA's Curiosity rover, scientists found that 'megafloods' once washed through the surface of the planet nearly 4 billion years ago
Dust storms were spotted on Titan in September 2018, which for the first time that raised the prospect that the storms might be a precursor to alien life