Sacrifice is an age-old ritual, but the inhabitants of 10th-century Peru brought sinister novelty to their rites by slaughtering children. In the Lambayeque valley on the north coast, the earliest definitive evidence of ritual child sacrifice uncovered.... "The scale and sheer complexity of the blood sacrifice of children appears to be something completely new," said Haagen Klaus of Utah Valley University in Orem... To investigate the role of ritual sacrifice in the Middle Sicán period, researchers examined 81 skeletons at the site, probing their teeth and bones to determine who they were and why they'd been killed. ... 70 per...