Cats sleep for about 50 to 113 minutes at a time ... birds, and other forms of nature can be mentally enriching. If you really want to thrill your cat, hang some bird feeders right outside ...

Cats have different sleep-wake cycles than other animals and are often busy at night. This is because cats are crepuscular, which means they hunt and are active in the evening or early morning.

Countless studies illustrate how animals adapt sleep for their own particular needs. Primates, elephants, marine mammals, insects, birds — even our own pet dogs and cats — all sleep differently.