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In northeastern China, paleontologists have uncovered two previously unknown species of feathered theropod dinosaurs dating ...

Ubiquinone, a metabolite critical to generating energy in cells, has long been thought to be the only mitochondrial electron ...

Published in Science Advances, the study found that many species do not stick to a single daily rhythm, contradicting decades of scientific assumptions. These findings reveal the flexibility of ...

The idea that extreme heat could one day cause a mass extinction and end the dominance of humans is not as farfetched as it ...

In 1938, zoologist Ellis Le Geyt Troughton mourned that Australia's "gentle and specialized creatures" were "unable to cope ...

Highly Pathogenic Avian Influenza has spread to mammals in Texas, affecting foxes, raccoons, striped skunks, and domestic ...

The endangered mammals are among the smallest of their kind in North America, according to the Bureau of Land Management.

It is very difficult to know exactly the history of the Earth. For millions of years, the planet was inhabited by species ...