Those who get out of bed by 7am are more likely to be thinner and happier.
20
You forget 90% of your dreams.
256
Honeybees never sleep.
276
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240