Termites work 24 hours per day and they do not sleep.
57
Honeybees never sleep.
276
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149