成人快手

Chinese study of the recent Sars (severe acute respiratory syndrome) epidemic shows the coronavirus was probably passed from animals into humans. Looking at grains of rock that are stardust, older than Earth itself. Is a fossilised jaw bone discovered in Belgium that of a prehistoric legged fish called ichthyostega, and how might it be related to one found in Greenland? Deep-sea imaging reveals a "fossil" lifeform alive and well.