5. By the end of 2015, Shanghai's population of migrant residents had decreased to 9.8 million, comprising 40.6 percent of the city's roughly 24 million permanent residents, according to statistics released by the Shanghai Municipal Statistics Bureau on Monday.
11. Our gut bacteria are messing with us in ways we could never have imagined. New research has revealed that neurodegenerative diseases like Parkinson's might actually start out in the gut, rather than the brain, and there's mounting evidence that the human microbiome could be to blame for chronic fatigue syndrome. With gut bacteria showing signs of controlling our appetite, changing our brain structure, and triggering brain lesions that could lead to strokes, our tiny passengers are a force to be reckoned with.