The average cat sleeps about 2/3 of the day.
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Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
Bats sleep 18-20 hours per day.
5
Dieters who sleep more take off more fat that those who sleep less.
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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13