At the Jimmy Buffett-branded community, a hint at how increasingly long-lived species might choose to spend their extra decades.

For thousands of years, sailors in the Marshall Islands have navigated vast distances of open ocean without instruments. Almost nobody on Earth understands how they do it. And soon, the few people who do will be gone.

People with Prader-Willi syndrome, caused by a genetic defect, always feel as though they’re starving. How can you condition them to control their appetites when temptation is everywhere?