Death rates may not have been so dire if the reefs were not overstressed by other things humans are doing — again, we'll never know.

我们又一次永远也不知道如果没有人类的过度活动，珊瑚礁是不是还会有这样惊人的死亡率。

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If linked to your phone by Bluetooth, it could send you e-mails telling you when you're overstressed and need to chill.

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