The hunt for alien life elsewhere than Earth has been raging for centuries, but two scientists believe 2020 could be the year a major breakthrough is made. The Japan Aerospace Exploration Agency’s (JAXA) Hayabusa-2 has collected soil samples from the asteroid Ryugu, and the space craft is set to return these samples to Earth this year. Scientists will then analyse the soil samples, and experts believe it could be the best shot yet of finding microbial life.