evolution

I'm hoping someone who knows a lot about the evolution of the Nautilus will help me with this question. So as far as I'm aware, the ancestral number for all cephalopod limbs is ten and nautiloids had gained more (up to ninety). The thing I'm wondering is how and why, mainly the how part. Did the...

Everyone loves dinosaurs, right? But I hardly need to point out here that the fossil record of cephalopods goes way further back, and is WAY more exciting. Isn't it time for ancient cephs to enjoy their version of the 1970's dinosaur renaissance? Well, last year I managed to convince a...