1.  A period of climate change, in which human groups were placed under stress, might have triggered the emergence of symbolic thought.

2.  Chagnon believed that like many other human groups, the Yanomami were endowed through nature and evolution with unbridled savagery and incessant dedication to intra-tribal warfare.

3.  Human groups that depended on Stone Age technologies also depended on mutual caring.

4.  The Catholic Church therefore repudiates every persecution against a people or human group anywhere, at any time.

5.  Whether the two human groups were exact contemporaries in the region, or moved in and out without meeting, has not been determined.

6.  A stone tool factory the team uncovered in Kenya is so old that the toolmakers might not even have belonged to the human evolutionary group Homo.

7.  All had their throats slit, said Jacob Hamzah, leader of a local human right group.

8.  An Egyptian human right group charged Sunday that Egyptians working in the Gulf have been subjected to suspect killings, arbitrary detentions and torture.

9.  Human right groups are also skeptical.

10.  Human right groups blame most of the killing on the Tutsi-dominated army.