A new study shows that exposure to two specific 'forever chemicals' may accelerate biological aging, especially in middle-aged men. Researchers revealed a link between faster epigenetic aging, and two of these alternatives, PFNA and PFOSA, a precursor of PFOA.

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The south Kensington museum has also acquired the first video ever uploaded to the site, called Me at the Zoo, posted by YouTube's co-founder Jawed Karim in April 2005.

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