Those who get out of bed by 7am are more likely to be thinner and happier.
20
People who sleep late have more mental stamina and can outperform early risers.
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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
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The strangers in your dreams are actually people that you've seen in real life.
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