Sweet sleep may restore the human body and mind, but how does sleep affect other organisms? You may be surprised to learn about the sleep habits of giraffes and some other creatures. Take this quiz to learn about the sleeping habits of all creatures.
There is a decrease in physical activity and less reaction to outside stimuli during sleep.
Bats hang upside down while sleeping.
Sometimes, horses sleep standing up.
Giraffes may need only about 30 minutes of deep sleep per day.
A brown bat may sleep for 20 hours per day.
A mammal baby usually requires more sleep than its parents, but baby orcas and baby bottlenose dolphins don't seem to sleep at all during their first few months.
50 percent of the brain may power down during unihemispheric sleep.
Whales and dolphins may remain semi-alert during unihemispheric sleep.
It is unclear whether fish actually sleep or simply rest.
Sleep, coma, and hibernation are each a state of reduced consciousness.
Sleep is the most easily reversible state of reduced consciousness.
An electroencephalogram is a record of brain electrical activity.
A bird's sleep pattern may be interrupted when migrating.
A power nap is a short, non-deep sleep, and the purpose is to revitalize the sleeper.
When you do not get enough sleep, you incur a sleep debt. A large debt could cause physical and mental fatigue.