this post was submitted on 11 Apr 2025
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Science Memes

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Tigers πŸ… 🐯 (mander.xyz)
submitted 1 month ago by [email protected] to c/[email protected]
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[–] [email protected] 182 points 1 month ago (2 children)

It’s also orange because mammals can’t produce green pigments, so orange is the next best thing if your prey is red-green colorblind.

[–] [email protected] 102 points 1 month ago* (last edited 1 month ago) (2 children)

Our primary outer protein is basically keratin, which can be tinted orange(carotene), beige (collagen) or brown/black (melanin).

The green pigment is a byproduct of bilirubin catabolism, which we don't have because we use a different pathway to metabolize and recycle it.

[–] [email protected] 47 points 1 month ago (1 children)

Found the tiger.

[–] [email protected] 15 points 1 month ago (1 children)

Good eyesight!

[–] [email protected] 4 points 1 month ago

Not particularly, just doesn't have hooves.

[–] [email protected] 3 points 1 month ago (1 children)

the green pigment? What green pigment?

[–] [email protected] 26 points 1 month ago

For reptiles and other stuff, we don't have those.

[–] [email protected] 3 points 1 month ago (2 children)

... So how do green eyes work?

[–] [email protected] 9 points 1 month ago (1 children)

Addressed this previously here: https://lemmy.blahaj.zone/comment/13887364

[–] [email protected] 2 points 1 month ago

Awesome thanks!

Neat to learn mammals are normally green due to genetic structures.

So green hair and fur could never happen naturally.

[–] [email protected] 3 points 1 month ago (1 children)

The color of your eyes doesn't have anything to do with the cones and rods that pick up the light reflected off of objects.

[–] [email protected] 1 points 1 month ago

I mean the pigment of the iris.