Sentences with phrase «when tetrapods»

TW: eed researchers focused on a handful of sites in Scotland, which was much closer to the equator and had a tropical climate when tetrapods were first coming ashore.

Not exact matches

Fossil finds from this transitional period are too few to explain why or how it occurred, or exactly when the first fully terrestrial tetrapods evolved.

Through her discussion of when, where, and how vertebrates first came ashore, Clack offers an up - to - date account of our understanding of the fish to tetrapod transition, one of the classic evolutionary stories.

Fish first adapted to life on land about 350 to 400 million years ago, when they evolved four legs to form the tetrapods, a group that includes amphibians, reptiles, birds and mammals.

«Our discovery suggests that the current scientific consensus is mistaken not only about when the first tetrapods evolved, but also about where they evolved,» says Grzegorz Niedźwiedzki of the Department of Palaeobiology and Evolution at the University of Warsaw in Poland, who discovered the footprints in 2002 in an old quarry near the town of Kielce.

«When you look at the entirety of the Haramiyavia jaw and its primitive features, it's clear that this group sat at the very base of the mammalian family tree, much in the same way that Tiktaalik rosea sat at the base of the tetrapod tree.»

It may take us a century to halt it and reverse it during the worst times of it when we are living in a very harsh world not too different from the 3 million year time between the Great Dying of the Permian and the beginning of the Triassic where life in the sea was on a razor's edge and there was only one major tetrapod on land much further north.