Fruit flies were picked by Thomas Morgan, an early geneticist, because they are easy to breed in large numbers-and it helped that some of their cells have giant chromosomes which showed up well under the microscopes of the day.
Toxic algae blooms have become more common when waters get warmer, as they've done this year with the Pacific Ocean current and weather pattern called El Nino.
As the walkout nears the four-week mark, people in the city are being warned the warm weather is creating the perfect storm for pests to multiply among almost 19,000 tonnes of uncollected rubbish.
So researchers have kind of tried to check their work here, and they have found evidence that really does seem to suggest that these cells are not reproducing very much in this mud.