A little more than a year ago, on a trip to Nairobi, Kenya, some colleagues and I met a 12-year-old Masai boy named Richard Turere, who told us a fascinating story. His family raises livestock on the ...

February 18, 2026 • A study finds that people who did one specific form of brain training in the 1990s were less likely to be diagnosed with dementia over the next 20 years.