This story is part of your SHN+ subscription In 2026, the oldest baby boomers turn 80. It’s an important time for the senior living industry, but not an ...
The Chosun Ilbo on MSN
Korean researcher solves 60-year-old sofa problem
For nearly 60 years, the “moving sofa problem,” a long-standing mathematical puzzle, remained unsolved. Last year, a Korean ...
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