Placoderms were the planet's dominant life form for 60 million years ... its heart was more complex than expected for these primitive fish. It had two chambers one on top of each other, similar ...
Fish appear in the fossil record before four-legged animals (tetrapods), so the ancestor of this group must be at least as primitive as a fish. The most ancient fish were jawless, and since our ...
The earliest "babies" known to science have been uncovered in the remains of a primitive fish found in Orkney ... t have been capable of independent life. And, they say, they can be confident ...
and then bring a basket of kelp to my primitive hut where I hang it outside to dry. A few days later I bring a fish I had caught in the surf and wrap it in the dry kelp to grill it on the adobe ...
A tropical reef in the Czech Republic, 409 million years ago: Radotina, one of the most primitive jawed vertebrates with teeth, emerges from its hiding place in the empty shell of a giant nautiloid to ...