Mystery of "lost" Japanese kingdom continues

Archaeologists in Japan have long known about the existence of the ancient Yamatai kingdom, but they have never been able to find it. Now they are seeking the help of history buffs to solve the mystery.

Researchers are studying partially-excavated ruins dating from the 2nd to the 4th centuries, the right time period for the kingdom, but have yet to find the palace or verify the location of the grave of Himiko, a 3rd century queen.