The evolution of our teeth began among ancient armoured fishes more than 400 million years ago. In the scientific journal Science, an international team led by researchers from Uppsala University presents ground-breaking findings about these earliest jawed vertebrates. Using powerful X-ray imaging, they show that unique fossils found near Prague contain surprisingly modern-looking teeth.
An international team of scientists led by Uppsala University (Sweden), in collaboration with the ESRF, the European Synchrotron (France), the brightest X-ray source, has digitally 'dissected', for the first time, the most primitive jawed fish fossils with teeth found near Prague more than 100 years ago. The results, published today in Science, show that their teeth have surprisingly modern features.
How does evolution impact ecological patterns? It helps smooth out the rough edges, says UConn Ecology and Evolutionary Biology Professor Mark Urban. Urban led an international team of researchers through a review of the history of ecological and evolutionary research to establish a framework to better understand evolution's impact on ecosystem patterns. The research is published as a perspective in the Proceeding of the National Academy of Sciences.
A report in the journal Current Biology on July 9 offers a detailed description of the first nearly complete skeleton of an extinct large dolphin, discovered in what is now South Carolina. The 15-foot-long dolphin (Ankylorhiza tiedemani comb. n.) lived during the Oligocene--about 25 million years ago--and was previously known only from a partial rostrum (snout) fossil.
The discovery of the first juvenile dromaeosaurid lower jaw bone on the North Slope of Alaska supports a growing theory that some Cretaceous Arctic dinosaurs did not migrate with the seasons but were year-round residents, according to new research by SMU paleontologist Anthony Fiorillo. The research was published today in PLOS ONE. Prior to this find, only tiny dromaeosaurid teeth have been discovered in this region.
Several species of fish have adapted to harsh environments using the same mechanism, which brings to question evolutionary chance, according to a study by Kansas State University and Washington State University.
Evolutionary biologists from the University of Konstanz resolve a century-old question regarding the asymmetric genitals of internally fertilizing fishes of the family Anablepidae. Surprisingly, the direction of genital asymmetry in these fishes is random rather than hereditary.
Large blocks of 'plug and play' genes play a super-sized role in adaption-and may help fill lingering gaps in Darwin's theories
From movies to museum exhibits, the dinosaur Dilophosaurus is no stranger to pop culture. Many probably remember it best from the movie 'Jurassic Park,' where it's depicted as a venom-spitting beast with a rattling frill around its neck and two paddle-like crests on its head. But a new comprehensive analysis of Dilophosaurus fossils is helping to set the record straight, finding that the Dilophosaurus was actually the largest land animal of its time.
Many animals move their ears to better focus their attention on a novel sound. That humans also have this capability was not known until now. A research team now has demonstrated that we make minute, unconscious movements of our ears that are directed towards the sound want to focus our attention on. The team discovered this ability by measuring electrical signals in the muscles of the vestigial motor system in the human ear. The results have now been published in the journal 'eLife'.