Support WBURJapan (Very Carefully) Drops Plastic Explosives Onto An AsteroidPlay01:46Download AudioGeoff BrumfielApril 05, 2019 ShareJapan's Hayabusa2, seen in this illustration, has been probing the asteroid Ryugu since 2018. The spacecraft is collecting samples that will be returned to Earth. (JAXA/Akihiro Ikeshita)