While other related groups were semi-nomadic and formed coastal communities, the Moken considered themselves true nomads of the sea.

BBC: The end of a wandering way of life?

The researchers recorded GHC behaviour in four social groups of semi-wild chimpanzees living in the Chimfunshi Wildlife Orphanage Trust (CWOT) in the north west of Zambia.

BBC: Chimpanzee grooming is a 'postcode lottery'

Government free schools are semi-independent and are set up by groups including parents and charities.

BBC: Waverley School

The top two teams from those groups will qualify for the semi-finals.

BBC: English teams eye Twenty20 glory

The eight teams taking part have been divided into two groups, with the top two from each reaching the semi-finals.

BBC: Middlesex learn Champions rivals

The world's top eight players have been divided into two groups for this tournament, with the top two from each progressing to the semi-finals, although world number three Serena Williams and number five Venus Williams are absent this year through injury.

BBC: Caroline Wozniacki & Vera Zvonareva win Doha openers

The teams will be divided into two groups of four teams each, with the top two teams from each group qualifying for the semi-finals.

BBC: Champions League format announced

The Intercontinental Cup involves 12 teams, divided into four groups of three, playing a series of three-day matches with the winners progressing to the semi-finals in the United Arab Emirates in November.

BBC: Davison dominates USA