The Anglo-Saxon Invasion: Britain Is More Germanic than It Thinks

From a recent Der Spiegel article:

Biologists at University College in London studied a segment of the Y chromosome that appears in almost all Danish and northern German men -- and is also surprisingly common in Great Britain. This suggests that a veritable flood of people must have once crossed the North Sea.

New isotope studies conducted in Anglo-Saxon cemeteries produced similar results. When chemists analyzed the tooth enamel and bones of skeletons, they found that about 20 percent of the dead were newcomers who had originated on mainland Europe.

Archeologist Heinrich Härke of the University of Reading has now come up with a quantitative estimate of the migratory movement. He suspects that "up to 200,000 emigrants" crossed the North Sea.

I think this proves beyond any reasonable doubt that the English are not indigenous to Britain.