Archaeologists are now revealing a mass grave filled with the remains of more than 140 children in Peru, which they describe as a 15th-century ritual sacrifice site. The site, near the UNESCO world heritage site of Chan Chan, has now become the largest known mass sacrifice location of children in the Americas. The findings say that boys and girls between the ages of 5 and 14, as well as 200 llamas, had their hearts ripped out of their chest in ritual fashion. Researchers who conducted the excavation for nearly five years say the site is linked to the early Chimu culture. The stunning discovery is now the newest look into the gruesome practice of "child sacrifice in the ancient world."