Hollow-horned

hi, thanks for those thoughts - I think a tooth can be ruled out, though it sure looks like one, because it's light and hollow and just not tooth material. An air bladder - had to look this up on Wiki, but I'd imagine it would have soft flexible walls? this thing hasn't collapsed out ...

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friend found this on the beach here in Australia. It smells fishy - literally. it's light and seems hollow. any clues?

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... mammals are deuterostoma (mouth second) and insects protostoma (mouth first): when the embryo develops from a solid ball into a blastula (a hollow sphere) into gastrula a hollow sphere with an opening), the first opening becomes the mouth in protostoma, but the anus in deuterostoma. So after ...

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This is what wiki says: Cyanobacteria include unicellular and colonial species. Colonies may form filaments, sheets or even hollow balls. Some filamentous colonies show the ability to differentiate into several different cell types: vegetative cells, the normal, photosynthetic cells ...

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... trying to find information of a hypothetical membrane protein, basically to see if something like it does actually exists. The protein would be a hollow capsule containing a tethered polymer chain inside, that is released, for example to anchor to a substrate or for recognition purposes. I would ...

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