How common is it in the general population, beyond the population of studied athletes?

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Although the Tamiflu-resistant strain is still relatively rare, affecting about 2% of people with swine flu in the Australian population that they studied, Dr Hurt is concerned that it has the potential to turn global.

BBC: Drug-resistant pandemic swine flu 'community risk'

The Finnish researchers studied a population of people, called Sami, who lived in northern Scandinavia from the 17th to the 19th centuries.

BBC: The secret of a longer life?

In the UK, 10-15% of the population are classed as having CKD, and that is probably the population they should have studied.

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Las Vegas had a population of 70, 000 when I studied geography in the fifth grade.

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Nationally, West Virginia was the only state in the period studied that did not show a rise in minority population.

NPR: Mid-Decade Report: Immigration Spreading

Only four of the 56 species studied in the UK Butterfly Monitoring Scheme saw an increase in population size.

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In 14 of the 20 countries studied, these increases in wealth outpaced the growth of their population, leaving per-person wealth higher in 2008 than in 1990.

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The researchers studied the genetic makeup of 50 patients with vCJD, approximately half of the population known to have the disease.

BBC: 'Missing gene increases CJD risk'

In the new study, scientists studied mitochondrial DNA extracted from well-dated fossil bear skeletons to work out how population size changed over time.

BBC: Early human 'squatters' drove cave bears to extinction