Explaining differences in rates of evolution

Scientists look to fossils and evolutionary trees to help determine the rate of evolution – albeit with conflicting results. A new model by ETH researchers has helped to resolve these contradictions.

Reconstructing a vanished bird community from the Ice Age

Visit Peru's Talara Tar Seeps today and you'll see a desert, but 15,000 years ago, the area was grassland and forest, roamed by dire wolves and saber-toothed cats. If you had gone for a walk in the Talara during the last ...

Why many similar species coexist within complex ecosystems

Scientists from the universities of Granada and Warwick have published an article in the journal PNAS (Proceedings of the National Academy of Sciences), in which they suggest one possible answer for the enigma of stability ...

Complete 9,000-year-old frozen bison mummy found in Siberia

Many large charismatic mammals went extinct at the end of the Ice Age (approx 11,000 years ago), including the Steppe bison, Bison priscus. A recent find in Eastern Siberia has uncovered one of these bison, literally, frozen ...

Extinctions reduces speciation

The same factors that increase the risk of species extinctions also reduce the chance that new species are formed. This is concluded by two biologists at Umeå University. Their findings are published in the April issue of ...

NASA image: Agricultural fires in central Africa

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite detected hundreds of fires burning in central Africa on August 21, 2013. The fires are outlined in red. Most of the fires burn in grass or ...

Agency says shark population is stable

The National Oceanic and Atmospheric Administration announced Friday that the northeastern Pacific Ocean population of great white sharks is not in danger of extinction and does not warrant listing under the Endangered Species ...

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