Many mammals have the biological characteristics of nocturnal activity such as the fovea of the retina and sensitive hearing and taste. These characteristics indicate that during the existence of dinosaurs, in order to ensure safety, most small animals are active at night to ensure that they are not active during the day. Encountered a dinosaur.

Sleeping trivia: Why do humans sleep at night?
Sleeping trivia: Why do humans sleep at night?

The same is true for us humans, so we are now able to develop the habit of sleeping at night, thanks to the extinction of dinosaurs.

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