Palaeobiologists from the University of Bristol and Howard University (USA) have uncovered new evidence that suggests that horses' legs have adapted over time to be optimised for endurance travel, rather than speed.
An international team of researchers presents the first observations of the development of the skull and brain in the living coelacanth Latimeria chalumnae. Their study, published in Nature, provides new insights into the biology of this iconic animal and the evolution of the vertebrate skull.
A new study into one of the world's oldest types of fish, coelacanth, provides fresh insights into the development of the skull and brain of vertebrates and the evolution of lobe-finned fishes and land animals, as published in Nature.
Analysis of human remains from a Pre-Roman Celtic cemetery in Italy shows variations in funerary treatment between individuals that could be related to social status, but these variations were not reflected by differences in their living conditions. Zita Laffranchi of Universidad de Granada, Spain, and colleagues present these new findings in the open access journal PLOS ONE on April 17, 2019.
The complete skeletal remains of a new species of Mongolian dinosaur fill in a gap in the evolution of hadrosaurs, according to a study released April 17, 2019 in the open-access journal PLOS ONE by Khishigjav Tsogtbataaar of the Mongolian Academy of Science, David Evans of the Royal Ontario Museum, and colleagues.
Using a powerful X-ray-based technology, Brown University scientists tracked catfish as they caught and swallowed prey to develop a precise understanding of the complex set of motions required to create the suction necessary to eat. They found that many of the bones in the catfish skull work in a coordinated manner to catch food. However, the bones move more independently when the fish swallow.
Why do some animals eat or abandon their offspring? According to researchers at the University of Tennessee and the University of Oxford, these might actually be forms of parental care. Published in Frontiers in Ecology and Evolution, their mathematical model shows that when overcrowding threatens offspring survival -- which often occurs due to spread of infection or competition for resources -- sacrificing a few so the most can live becomes the ultimate form of tough love.
Bacterial cells that normally colonize our guts can distinguish themselves from other bacterial species using what's traditionally considered their enemy -- a virus. Researchers report April 16, 2019, in the journal Cell Reports that some bacteria use viruses that have infected them (i.e., phages) for self-recognition and thereby show greater fitness, repelling competitors that lack this adaptation.
Researchers say mercury buried in ancient rock provides the strongest evidence yet that volcanoes caused the biggest mass extinction in the history of the Earth. The extinction 252 million years ago was so dramatic and widespread that scientists call it 'the Great Dying.' The catastrophe killed off more than 95 percent of life on Earth over the course of hundreds of thousands of years.
Pollen genes mutate naturally in only some strains of corn, according to Rutgers-led research that helps explain the genetic instability in certain strains and may lead to better breeding of corn and other crops.