Forty is not what it used to be, at least not if you're a professional athlete. 44-year-old Serena Williams returned to Wimbledon, albeit losing to a 20-year-old. 41-year-old LeBron James just announced he'll be playing another year, though leaving the Lakers.

Source: [CBS News](https://www.cbsnews.com/video/age-defying-pro-athletes-amaze-fans-inspire-generations/)

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