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Scientists spent two years trawling the oceans for bacteria and viruses, and in the process discovered 6 million new genes, doubling the number known on Earth and holding promise for new antibiotics and alternative energy sources.

Critics blame South Africa's high HIV infection rates on government inaction and mixed messages. Recently, however, the deputy president of the country has called for intensification of the fight against AIDS. Charlayne Hunter-Gault reports from Johannesburg.