Such a study demonstrates cognitive development is not purely dependent on maturation but on cultural factors too — spatial awareness is crucial for nomadic groups of people. (simplypsychology.org)
Soon the Sahara's oases began to dry up, causing water shortages for nomadic groups and wildlife. (newscientist.com)
There were no immediate reports of any group claiming responsibility or making demands in the area crossed by nomadic groups and rebels fighting the Sudanese government over the border in Darfur. (nigeriapoliticsonline.com)