While humans have circular pupils, why do cats have vertical pupils as shown in the picture?
Correct answer: Allows for a huge change in constricted and dilated stage

Player #9442102
cats really are amazing. I've always had a cat around and I still learn things from them.

SOOTI
Dogs have owners, cats have servants.

Ray Mission
Player #9442102, Dogs can't do MRIs but CATSCAN...

RushMama2112
Player #9442102, I agree! I've had cats all my adult life.
But I seriously question why 4 people downvoted this comment. Why would anyone look at an innocuous comment like tis and dislike it? Geez, some people.

Frantic2win
I LOVE GINGER TOMS!!!!!

Stephanie.S.
SOOTI, I know. For many years I've belonged to a cat! 😺

MFG
SOOTI, Meow means now!

Stephanie.S.
There's no such thing as "most unique!" Unique means "the only one". I sometimes hear people say "Very unique" too. Nothing can be that either. It's either the only one and therefore unique, or it's not

Player #Meg
unique has no degrees of uniqueness.

Player #66817220
Ray Mission, but some dogs can give Lab results.

Lynn
Ray Mission, groan...

Maestra
Arohanui, they’re sideways & not the same as a cat’s.

Nummynuts
Player #7106191, I reported it lol

Player #66817220
Donna, three: upper, lower, and nictitating ("third eyelid").

Player #66817220
Player #7106191, trust me -- my cat was always most active in the middle of the night!

Student for life
Stephanie.S., we're all unique. there's only one of you. most unique and perhaps means to stand out...

Student for life
SOOTI, dogs have human friends, cats have freedom

Goblin
Arohanui, Right? I think goat eyes are both creepy and beautiful. They are really sweet animals.

Donna
Cats also have 2 eye lids for each eye.

Player #14680106
Arohanui, and their pupils are rectangular!

Player Bengal Mama
Arohanui, A vet once told me it was to widen their field of vision

MFG
Player #7106191,y cats have always been nocturnal, and I have had many cats.

baymax
Player #7106191, so are some owls!

RushMama2112
Arohanui, interesting point.