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Jakdracula@lemmy.world to 196@lemmy.blahaj.zone – 319 points –
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For anyone curious deer have a velvety layer on their antlers that allows the antlers to grow. This layer eventually falls/is rubbed off of the antlers leaving the bone exposed. That's what's happening here.

Not only deer, but all antlery animals (moose, reindeer, elk, etc). It's completely normal and pain free, but it looks like something out of a horror movie.

For some reason, this does not happen to animals with horns, such as cows.

Unlike horns, which like finger nails grow from the base, antlers are basically bones.

Bone that falls off after the mating season and regrows the next spring

It always weirds me out that antlers just fall off. Like, bone isn't supposed to do that for us. What if we randomly shed bones every year?

If you've ever seen the skull of a horned animal versus an antlered animal the difference between antler and horn is pretty clear. The center of a horned animals horn is bone and forms a single continuous piece connected to the skull, surrounded by flesh and hard keratin (like finger nails). Antlers grow more like a knuckle, not connected to the skull as one continuous piece.

Another horned oddity is the rhino, whose "horn" is more like a specialized fingernail (keratin again) than a true horn. A rhino "horn" is like a compressed lock of hair filed to a point, a hair shiv if you will.

Yet another weird horn like thing is the giraffe. They have bone knobby lumps on their head that are like something between a horn and an antler, being bone fused to the skull surrounded by flesh but without keratin.

Then there are narwhals. I don't know anything about narwhals. But they are cool and have "horns".

The narwhal's horn isn't a horn but a tooth.

Evolution is fascinating, all these species reinvented the same tool using different parts of the anatomy.

normal and pain free

Well, it is quite bloody, which suggests that the tissue is very much alive. Do they have no pain receptors there or did the brain “learn” to ignore them?

It's completely normal and pain free

I like to think it's a bit painful, but in the good way like wiggling a loose tooth. By the way they rub their antlers on stuff, it might itch a little too.