From fins to limbs | EurekAlert! Science News

When tetrapods (four-limbed vertebrates) began to move from water to land roughly 390 million years ago it set in motion the rise of lizards, birds, mammals, and all land animals that exist today, including humans and some aquatic vertebrates such as whales and dolphins. The earliest tetrapods originated from their fish ancestors in the Devonian […]

How did forelimb function change as vertebrates acquired limbs and moved onto land?

Life reconstruction of the early tetrapod Pederpes showing the forelimb bones beneath the skin. Credit: Image copyright 2021, Julia Molnar. When tetrapods (four-limbed vertebrates) began to move from water to land roughly 390 million years ago it set in motion the rise of lizards, birds, mammals, and all land animals that exist today, including humans […]

How insects activate muscles to adapt to limbs removed

IMAGE: Intact cricket walking (top) and walking after both middle leg amputation (bottom). The left panels show the patterns of leg movements. The right panels show muscle activation patterns. After leg… view more  Credit: Dai Owaki and Hitoshi Aonuma Adaptability explains why insects spread so widely and why they are the most abundant animal group on […]

From fins to limbs and water to land

IMAGE: The aerial scene depicts two Late Devonian early tetrapods – Ichthyostega and Acanthostega – coming out of the water to move on land. Footprints trail behind the animals to show… view more  Credit: Davide Bonadonna It’s hard to overstate how much of a game-changer it was when vertebrates first rose up from the waters and […]