How birds got their wings

Modern birds capable of flight all have a specialized wing structure called the propatagium without which they could not fly. The evolutionary origin of this structure has remained a mystery, but new research suggests it ...

A bone cancer tumor more than 215 million years old

More than 215 million years ago, a large amphibian species lived in floodplains in southwestern Poland: Metoposaurus krasiejowensis. On one of these fossils, Polish and American scientists, with the participation of researchers ...

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