Did you know that cats can sleep up to 18 hours a day? Or that a cat's heart beats twice as fast as a human heart?
Loving feline companions are easily amused and in turn provide easy amusement -- both in person ("So we meet again, sly piece of string!") and on the internet (cat videos are some of the most popular memes on YouTube). On the coldest of days they also make the best lap companions.
If you adopt a kitten at the Denver Dumb Friends League, you may also adopt a cat 1-year-old and older for free, or adopt two adult cats for the price of one.
PHOTOS of this week's adoptable Denver critters: