Fossil Friday!

Unlike my last specimen, this one does not give me the willies. However, fossils of this thing can be fairly creepy, perhaps because it’s so alien-looking.

But what is it? Plant? Animal? It’s definitely made of minerals. Is it bigger than a breadbox? Or, my grandfather’s favorite Twenty Questions question, what size hat would it wear? (He never really got the yes/no aspect of Twenty Questions.)

Sound off below.

Museum of Comparative Zoology, Harvard University