Life on Mars could reach Earth by riding asteroid impact debris, new study suggests
对微小而坚韧微生物的新见解对于寻找地球以外的生命具有巨大影响
Astronomers spot 'time-warped' supernovas whose light both has and hasn't reached Earth
两颗罕见的超新星最终会告诉我们宇宙膨胀的速度有多快吗?也许吧,但我们必须等待它们“重新出现”。