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.

· · 来源:edu资讯

The Milano Cortina Winter Games ended on Sunday night as the Olympics always do: in light, spectacle and speeches about unity. In Verona, the Olympic flag passed to the French Alps and the twin flames were extinguished. But unofficially, at least, a flame also flickered 6,000 miles west.

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Sian Cleaver from Airbus says the safety of the astronauts is the top priority

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