And though the temperature must have been fierce during the day, it would have been cooler at night, which would also have allowed her to lose less water through sweat.

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That's because the body's hormone levels (such as cortisol) vary during the day and cause a person's temperature to be the highest between about 4 and 6 p.m. and lowest around 6 a.m.

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The temperature on Eros is estimated to vary between 100 degrees Celsius during the day and 150 below zero during the night.

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