"Somewhat ironically, this then raises the question of whether modern human chewing damage is actually the best analog for these early hominids," Egeland added.

“讽刺的是，这又引起了现代人咬噬留下的伤痕是否确实模拟出早期人类的问题，”Egeland补充道。

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Egeland says the rebels are strong enough only to prove that the issues can't be resolved on the battlefield.

NPR: Darfur Violence Pits Sudan Against the U.N.

's top humanitarian official, Jan Egeland, says aid workers and civilians are getting caught in the crossfire in an increasingly complex war.

NPR: Darfur Violence Pits Sudan Against the U.N.

Both Egeland and Kapila approached Western governments but came away disappointed because most diplomats were focused on resolving another conflict, in southern Sudan, which had claimed 2 million lives over 20 years.

CNN: 'A horror movie and a snuff movie'