An astronomer has said scientific discoveries on asteroid could change what we believe about 'life as we know it'. Space communications expert, Alexandra Doten took to TikTok to detail the "huge news" after a spacecraft "grabbed a chunk" from asteroid, Bennu - some 63 million kilometres away - and safely returned it to our planet for analysis . According to NASA , Bennu "continues to provide new clues to scientists’ biggest questions about the formation of the early solar system and the origins