21.   The dating technique of using trapped electrons in rock, known as thermoluminescence, is relatively new and of uncertain reliability, archeologists said.

22.   There are other smaller pyramids and structures, many of which the archeologists say were religious burial tombs, perhaps of Olmec rulers.

23.   Archeologists on Thursday said they have unearthed a shaft containing skeletons of human sacrifices dating from before Christ.

24.   Archeologists said they are concerned about the accelerated corrosion of the submarine in the air while the excavation continues.

25.   Archeologists say Egyptian tombs and temples that have survived for thousands of years are actually very fragile because of a rising water table.

26.   Archeologists say the interesting parts were explored and opened to visits years ago.

27.   For the first time a complete and undamaged seal of one of the biblical Jewish kings has been uncovered, an archeologist said Thursday.

28.   For the first time, a complete and undamaged seal of one of the biblical Jewish kings has been uncovered, an archeologist said Thursday.

29.   Forensic archeologists say they have uncovered the bodies of children in the most recent stretch of excavations.

30.   The grave site dig could provide an insightful catalog of life in southern Greece during the Middle Ages, archeologists say.