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Message: <blockquote data-quote="ela_eluwa120" data-source="post: 12221989" data-attributes="member: 193664"><p>Firstly, night is not approximately 12 hours everywhere on earth. In the summer in Artic, there is no night-time, and there is 24 hours daytime.<img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /> On the other hand, in the artic winter, you have 24 hours of darkness. Sleeping time varies amoung species. Plus, sleeping time varies across the human lifespan too. Babies sleep more than adults, for example. In addition, things like sleep evolved as a response to the conditions on earth, and humans are here because humans are adapted to the conditions here.</p></blockquote><p></p>

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