3 doctors weighed in:
Are humans the only animals who sleep in 1 block of time? I have heard some animals are "polyphasic" and sleep multiple times per 24 hours.
3 doctors weighed in

Dr. Colin Kerr
Family Medicine
2 doctors agree
In brief: Sleep
Giraffes can go without sleep for weeks, while brown bats sleep for nearly the entire day.
Rats have similar sleep needs to humans. Mammals all have the same fundamental sleep cycle. Smaller animals, who often have higher rates of brain metabolism, tend to require more sleep, while larger animals generally get less sleep. All the animals that sleep less than four hours on average are large land ma.

In brief: Sleep
Giraffes can go without sleep for weeks, while brown bats sleep for nearly the entire day.
Rats have similar sleep needs to humans. Mammals all have the same fundamental sleep cycle. Smaller animals, who often have higher rates of brain metabolism, tend to require more sleep, while larger animals generally get less sleep. All the animals that sleep less than four hours on average are large land ma.
Dr. Colin Kerr
Dr. Colin Kerr
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