We like to joke about sentient robots, but it turns out there's one reason to be extremely optimistic about AI: the technology could significantly improve doctors' ability to diagnose cancer earlier. And if you find yourself preoccupied with longevity and mortality lately, there's even more good news: the average 50-year-old is still a "time billionaire." (More on what that means here.) Of course, how we spend that precious time is still up to us. Perhaps it's best avoid acting like Jürgen Klopp and throwing a tantrum so hard you pull a hamstring.