Humans have terrible night vision compared to many animals. It would be very difficult to farm, raise livestock, gather foods, etc in the dark. Also, we do have good color vision, and it would not be possible to take advantage of that fact if we slept during the day.
Because our brains wire us to be awake when you see light and to sleep when you don't see it. That can be cheated by having us exposed to bright LED lights or computer screens and you can change your habits. Unfortunately, there will be some consequences from the lack of sleep.
1 year ago
Last edited at 10:22PM on 12/23/2012
one reason: we rely on each other and live in a society, so we have to keep the same rest time.
another reason: our ancestors must be omnivorous animals or herbivores, and we need to see the different shape or color of plants clearly, that's why we have to make a living in the day and sleep at night.
Hi In my opinion everybody work in day.Because every organs and their mechanisms work in day very properly.Moreover our eyes are very sharp in day.And In night our body need relax means all the organs and mechanisms need rest in night. Thanks.