All tetrapods descended from a common ancestor that just happened to have limbs with five digits. And over the eons of evolution following that, natural selection worked with variations on ...

Newly discovered tetrapod footprints suggest that the evolution of limbed vertebrates may have occurred nearly 20 million years earlier than scientists previously believed, according to a study ...

If you took a progressive view, you might assume that tetrapods lost their rays during the course of evolution. In reality, however, the common ancestor of both tetrapods and goldfish lacked rays ...

It seems that evolution has forgotten them ... architecture of the set of chromosomes (karyotype) of the ancestral tetrapod from the sequences of the lungfish species that are still alive today.

Transitional fossils help scientists bridge gaps in the tree of life, resulting in a picture of gradual evolution over millions of years.

The over-arching goal of this project is therefore to understand how whole-body shape and size have interacted across major shifts in ecological and environmental niche occupation during tetrapod ...

Innovation and opportunity in the evolution of life A project to produce a complete evolutionary tree of tetrapods and use this to explore two core questions in macroevolution: the balance between ...

Sitting on top of a granite base are numerous concrete tetrapods weighing more than two tons each. They are placed carefully in position and locked with each other to create a formidable structure.