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BBC film-makers venture into Mexico's Cave of Crystals, which contains some of the largest natural crystals ever found.
A mosque collapses after a suicide bomb attack in north-western Pakistan, killing dozens of people and injuring many more.
A Muslim cleric in Saudi Arabia has called on women to wear a full veil, or niqab, that reveals only one eye.
Former US President Ronald Reagan is voted the "greatest American" in a poll which included six other presidents.
Transparency International names the biggest crooks in the field of political corruption, and warns of damage to development.
The UN passes a declaration on the rights of indigenous peoples despite opposition from four developed nations.
An ongoing row over pornography on Wiki sites escalates, as Jimmy Wales gives up some of his founder's rights.
The merger of Glaxo Wellcome and SmithKline Beecham will create the world's largest pharmaceutical company - full coverage from BBC News Online.
Cadbury is to be taken over by US food company Kraft after its board approved a new bid, the two companies have confirmed.