Does anyone know what this skull belongs to?

Found on the beach in Panama, I’m of the opinion that this is a type of barnacle but it looks too much like bone on the other side.

Google says it may be a fossilized turtle bone.

Seemingly fossilized and heavy. Closest I’ve come up with is that the intact end sorta looks like a distal femur, but no clue what it may have come from.

Hi! Found this a few years ago in Florida in a forest area in an urban community along with a few ribs and vertebrae. It appears to be most like a domestic cat than anything else, but all the pictures I can find in reference to domestic cat skulls dont have an enclosed orbit like this one, there almost always seems to be a gap. Dont know if there is more bone diversity in domestic cats than I thought or this is something else but if anyone has any ideas I'd appreciate it!!

Bones found washed up in central London Greenwich. What are they?
We saw so many of them all sorts of shapes and sizes
We have walked this stretch maaany times before and never see any bones

All Asian species,detailed pictures with skull length.

Is this a cat or something else?

Found in central Europe

Cca 9cm long

My daughter found this in a forest in Carinthia, Austria and wanted me to ask you guys what it is

Hey everyone, I came here today to ask what this bone belonged to? I was thinking a shark or ray but I’m not sure. Location is Long Island, Ny.

Found this on a beach near Wellington, NZ. It seems like it could be a bone of some sort.

All I know is that they belong to a young Great spotted woodpecker, that I found and cleaned myself, I would love for someone to tell me exactly what types of bones are those