Original sentence: Archaeological investigation, including radiocarbon dating, suggests that most known sites flourished between 1500 and 500 years ago.Evidence of human presence in Baja California is found as early as 9000 BCE.Other identified artifacts were created from bone, wood and local fiber, as well as marine shells.Proponents note that the Rio San Ignacio has a number of geographic similarities to Book of Mormon descriptions of the River Sidon.Tools and artifacts found in these sites include flaked slate and basalt choppers and scrapers, obsidian projectile points, and sandstone manos and metates
Edited sentence: Archaeological research, including radiocarbon dating, suggests that most known sites flourished between 1500 and 500 years ago.Evidence of human presence in Baja California has been dated to as early as 9000 BCE.Other identifiable artifacts were created from bone, wood and local fiber, as well as marine shells.Proponents note that the Rio San Ignacio has a number of geographic similarities to Book of Mormon descriptions.Tools and artifacts in these sites include flaked slate and basalt choppers and scrapers, obsidian projectile points, and sandstone manos and metates