Proceedings B is the Royal Society’s flagship biological research journal, accepting original articles and reviews of outstanding scientific importance and broad general interest. The main criteria for acceptance are that a study is novel, and has general significance to biologists. Articles published cover the breadth of the biological sciences; many but not all articles have direct relevance to organisms and the environments in which they live. The scope of articles that we publish includes, but is not limited to: behaviour, development, physiology, ecology, evolution, genetics, genomics, global change, conservation, morphology, biomechanics, neuroscience, cognition and paleobiology. Authors are encouraged to submit articles not only in these fields, but in all branches of biology.
The textbook version has tunas seizing the niche left by the K-Pg extinction. A new Yale phylogeny dates at least two of three endothermy origins to 10–15 million years after the impact, and the big body-size jump to 10.6 million years ago. The caveat: the branches are long enough that the traits could have appeared anywhere along them.