Is there a limit to how old humans could one day become? French researchers trying to answer the age-old question said they found evidence in two categories of people who lived long lives of a "biological barrier" to living forever.
有朝一日人類壽命是否有極限?試圖解答這個老問題的法國研究人員說,他們在兩類長壽者身上找到證據,發現要長生不老,有種「生理障礙」。