• Question: Why do we sleep and get tired?

    Asked by RubyDoobs to Andy, Duane, Giovanna, Katie, Theresia on 15 Nov 2014. This question was also asked by 268bdya26.
    • Photo: Duane Mellor

      Duane Mellor answered on 15 Nov 2014:

      Sleep is a time to recover and repair, it is also now known to be important for preventing obesity and type 2 diabetes. We have evolved to be awake during the day, and our bodies make hormones (melatonin and cortisol) which help to tell us when to sleep and be awake. So, if we miss sleep or wake up at the wrong time we can feel tired.

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