The turtle has been in no rush to give up the secret of its shell — but after two centuries of close study, scientists are filling in the story of a structure unique in the history of life.
New research led by Tyler Lyson of Yale University and the Smithsonian Institution pushes back the origins of the turtle shell by about 40 million years, linking it to Eunotosaurus, a 260-million-year-old fossil reptile from South Africa. The work strengthens the fossil record and bolsters an existing theory about shell development while providing new details about its precise evolutionary pathway.(more…)
For a short time in grade school, Kevin Boyce lived within two blocks of the La Brea tar pits in Los Angeles, a place where ice age mammal fossils had been discovered. Above his bed hung a poster of the Yale Peabody Museum’s famous Age of Reptiles mural. But it wasn’t a boyhood fascination with prehistoric life that influenced his interest in paleontology, but rather the medieval literary world of Chaucer that Boyce discovered in college.
“I didn’t think twice about fossils between the ages of 7 and 20,” said Boyce, associate professor in geophysical sciences. Even during his undergraduate studies in literature and biology at the California Institute of Technology in the early 1990s, the deep history of life on Earth was far from his mind. (more…)
*Collapse of Earth’s marine life 378 to 375 million years ago holds key*
An influx of invasive species can stop the dominant natural process of new species formation and trigger mass extinction events, according to research results published in the journal PLoS ONE.
The study of the collapse of Earth’s marine life 378 to 375 million years ago suggests that the planet’s current ecosystems, which are struggling with biodiversity loss, could meet a similar fate. (more…)
