Edinburgh, Scotland, April 30, 2008—Half-nude, red-painted revelers at the Beltane Fire Festival reenact an ancient, annual Celtic ritual heralding the May 1 arrival of summer—"Beltane" being Celtic for "May."

Revived in the 1980s, the festival is part of an effort by modern Celts to celebrate the lost cultures of their ancestors, who dominated Europe some 2,000 years ago.

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