Archaeologists have unearthed shell tools around 20,000
years old that could help clear up mysteries surrounding the ancestors of
modern Japanese people, a museum said Feb. 15.
The Okinawa Prefectural Museum & Art Museum said the
shell tools--the first uncovered in Japan from the Paleolithic Age--were dug up
at the Sakitari-do cave site in Nanjo, Okinawa Prefecture, near the site where
the country’s oldest whole skeletons were found.