A volunteer with the Israeli Antique Authority holds a bone found at the Cave of the Skulls, an excavation site in the Judean Desert near the Dead Sea, Israel .

Volunteers with the Israeli Antique Authority work inside the Cave of the Skulls, an excavation site in the Judean Desert near the Dead Sea, Israel .

A volunteer with the Israeli Antique Authority works at the Cave of the Skulls, an excavation site in the Judean Desert near the Dead Sea, Israel.

A volunteer with the Israeli Antique Authority holds a securing rope as he walks down to enter the Cave of the Skulls, an excavation site in the Judean Desert near the Dead Sea, Israel.