Mexican authorities find 4 human skulls in package bound for US
The package originated from one of Mexico's most violent states
Nine crocodile heads found in Ancient Egyptian tombs a “first of its kind” discovery
Previously, archaeologists have found crocodile mummies buried inside temples
Skulls are emerging on a Florida beach after Hurricane Nicole: Officials think it could be a Native American burial ground
“It was just surreal. Just to think that this is something that we walk on on a daily basis and nobody knows"