Scientists have discovered the world's oldest blood cells in the remains of a 5,300-year-old iceman found in Italy. The scientists found traces of blood around an arrow wound that killed the man in the mountains of what is now the Alto-Adige region of northern Italy. "Otzi the iceman" was discovered in 1991 at 3,200 metres in a glacier by hikers in the German-speaking region near the border with Austria. After using a microscope to identify what appeared to be red blood cells, they confirmed the discovery by using an atomic force microscope which identifies molecules with a laser beam.
Via DC