New research shows that males and females of the same species can evolve to be so different that they prevent other species from evolving or colonising habitats, challenging long-held theories on the way natural selection drives the evolution of biodiversity.
A new study in Trends in Ecology and Evolution, which addresses how climate change is affecting the evolution of organisms, underscores the need for evolutionary, ecosystem and climate scientists to work together to better understand eco-evolutionary feedback dynamics.
Modern humans have brains that are more than three times larger than our closest living relatives, chimpanzees and bonobos. Scientists don't agree on when and how this dramatic increase took place, but new analysis of 94 hominin fossils shows that average brain size increased gradually and consistently over the past three million years.
A team of American Museum of Natural History researchers has created a computational model capable of predicting whether or not organisms have the ability to 'eat' other cells through a process known as phagocytosis. The model may be a useful tool for large-scale microbe surveys and provides valuable insight into the evolution of complex life on Earth, challenging ideas put forward in recent studies.
Dr. Matthias Stoeck from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and researchers from the University of Lausanne (Switzerland) and the Helmholtz-Centre for Environmental Research (UFZ) have just published an extensive phylogenetic tree for the Eurasian green toads. This phylogenetic tree shows that polyploid species are hybrids and only descend from parental species with a very high degree of genetic divergence.
Postnatal depression (PND) can impact the quality of relationships between mother and child into adult life, and have a negative influence on the quality of relationships between grandmothers and grandchildren, new research at the University of Kent has discovered.
All extreme-altitude birds have evolved especially efficient systems for delivering scarce oxygen to their tissues. But a new study led by the University of Nebraska-Lincoln has found that these birds often evolved different blueprints for assembling the proteins -- hemoglobins -- that actually capture oxygen in the Himalayas and Andes.
Dumbo octopuses live at a depth of thousands of meters in the oceans. A rare spectacle now provides further insight: a scientist filmed a dumbo octopus hatching from its egg. Based on these video and MRI scans of the internal organs, researchers from the Delaware Museum of Natural History, the University of Bonn, the University Hospital Münster, and the Woods Hole Oceanographic Institution document a surprising similarity of the hatchling with adult animals.
Problem-solving powers may help to explain why grey squirrels have taken over from native red squirrels in the UK, new research says.
Clonal ants appear to be diverse in responding to sweetened water, suggesting epigenetic regulation in behavioral variation and colony survival.