\nThe mouse study showed that the composition of the naturally occurring bacterial population that lives in the gut, known as the gut microbiome, changes with age — favoring some species of bacteria over others. These changes are registered by immune cells in the gastrointestinal tract, which spark an inflammatory response that hampers the ability of the vagus nerve to signal to the hippocampus — the part of the brain responsible for memory formation and spatial navigation. Stimulating the activity of the vagus nerve in older animals turned old, forgetful mice into whisker-sharp whizzes able to remember novel objects and escape from mazes as nimbly as their younger counterparts.
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More than 8,000 people have so far submitted evidence, with Baroness Amos meeting more than 400 families.，更多细节参见今日热点
国内成品油的消费者，也已受到了油价上涨的直接影响。3月9日，国内成品油价迎来“四连涨”，油箱容量为50升的小型私家车加满一箱油，将比之前多花27.5元左右，为四年来最大涨幅。多位原油分析师对界面新闻称，下一轮成品油价调整上涨的概率较大。