Life history of the 360-million-year-old tetrapod Acanthostega rewrites the tetrapod move to land

Researchers have shown that fossils of the 360 million-year-old tetrapod Acanthostega, one of the iconic transitional forms between fishes and land animals, are not adults but all juveniles. This conclusion based on high-resolution synchrotron X-ray scans of fossil limb bones, sheds new light on the life cycle of Acanthostega and the so-called conquest of land by tetrapods.
Paleontology News — ScienceDaily