NASA recently ended a manned mission to the International Space Station (ISS) a month early, citing a medical issue with one of the astronauts. The space agency just revealed that the impacted astronaut was Mike Fincke. This was the first medical evacuation in the history of the ISS.
The most jaw-dropping science images from February. Plus, whether cancer blood tests actually work and what we lose when we can’t see the stars.
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Фото: Amr Alfiky / Reuters
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与雪“共舞”二十余载，看到游客滑得尽兴，就是黄文勇最开心的时刻。