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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Source: Computational Materials Science, Volume 266
Beth Gardiner is right to argue that plastic is not merely a recycling failure (‘They pushed so many lies about recycling’: the fight to stop big oil pumping billions more into plastics, 19 February). It is something far more consequential: an oil growth strategy.。业内人士推荐搜狗输入法下载作为进阶阅读
儘管經歷了被關押的三個月，但劉亮認為，在扣留中心裡面，自己能夠得到比較人道的待遇，「他們會根據你的身體吃不同的飲食......一日三餐會根據不同營養的搭配，包括醫療，你只要跟officer（長官）報告，他們都能讓你即時就醫。」
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