Falling space junk can be tracked from its sonic booms

该研究通过追踪太空垃圾坠落时产生的音爆来追踪其轨迹。

Hulking kangaroo ancestors could hop just like their nimble descendants

本文研究指出，巨大的袋鼠祖先也能像敏捷的后代一样跳跃。

How Trump’s moves could dramatically reshape the scientific workforce

文章探讨了特朗普的政策如何可能大幅改变科学工作队伍。