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newscientist.com

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多語背景一直是我人生的一部分。我出生在一個以古吉拉特語為母語的家庭,來自印度的父母在 1970 年代從坦尚尼亞(Tanzania,坦桑尼亞)移民到英國。兒時,每週六我都會去當地的廟宇上課,補強我的閱讀與書寫能力。,推荐阅读91视频获取更多信息

But what if it’s not fine? Even back in 1996, before a single component of the ISS was launched into orbit, NASA foresaw the possibility of an even worse worst-case scenario: an uncontrolled reentry. The crux of this scenario involves multiple systems failing in an improbable but not completely impossible cascade. Cabin depressurization could damage the avionics. The electrical power system could go offline, along with thermal control and data handling. Without these, systems controlling coolant and even propellant could break down. Unmoored, the ISS would edge slowly toward Earth, maybe over a year or two, with no way to control where it is headed or where its debris might land. And no, we could not save ourselves by blowing the station up. This would be extremely dangerous and almost certainly create an enormous amount of space trash—which is how we got into this hypothetical mess in the first place.

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