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  Transgender Athletes in Women’s Sports: The Search for a Fair and Workable Policy Few issues in sports produce more heat—or less productive conversation—than the participation of transgender women in female competition. That’s partly because the debate touches several sensitive questions at once. What makes competition fair? When does a physical advantage become too significant? How should sports balance gender identity with sex-linked athletic differences? And when an event involves tackling, striking, or collision, how much uncertainty about safety is acceptable? The language matters, too. Transgender women are people whose gender identity is female and whose sex was recorded as male at birth. Describing the issue only as “biological males competing against women” highlights concern about sex-linked performance differences, but it can also dismiss the identity and dignity of transgender athletes. A serious discussion has to hold two ideas at once: transgender athletes deserve r...
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  ULTRA ENDURANCE AND THE ULTRA-FIT: THE RISKS AND REWARDS Exercise is one of the best-supported ways to improve health and extend life. It lowers the risk of cardiovascular disease, diabetes, several cancers, and premature death. That fact is not in dispute. Less certain is whether the benefits keep increasing when exercise becomes extreme: ultramarathons, Ironman-distance triathlons, multi-day cycling races, and years of high-volume endurance training. The popular claim that ultra-fit athletes “often die young” is not supported by the strongest available evidence. In fact, elite endurance athletes generally live longer than the wider population. Former Tour de France competitors have shown substantially lower mortality, while research following Olympic athletes has found gains in life expectancy, including fewer years of life lost to cardiovascular disease and cancer ( Parry-Williams and Sharma, 2020 ; Antero-Jacquemin et al., 2018 ). That does not mean extreme exercise is harmle...
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  The Minnesota Effect: What Starvation Science Teaches Us About Dieting and Human Behavior In 1944, 36 healthy young men volunteered to go hungry. They were conscientious objectors to military service during World War II, and they wanted to contribute to the relief effort in another way. Across Europe, millions of people were starving. Scientists knew that food could keep famine victims alive, but they knew much less about how to rehabilitate a person after prolonged deprivation. Physiologist Ancel Keys and his colleagues at the University of Minnesota designed an experiment to find out. The volunteers would first eat normally under controlled conditions. Then, for six months, researchers would cut their food intake until they had lost roughly a quarter of their body weight. A rehabilitation period would follow. The experiment became one of the most important studies of human starvation ever conducted. Its findings were eventually published in the two-volume Biology of Human ...
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  UNREGULATED AI: A CLEAR AND PRESENT DANGER Artificial intelligence isn’t one invention with one neat set of consequences. The label covers everything from movie recommendations and medical tools to autonomous weapons and software agents that can browse websites, send messages, run code, and spend money. We shouldn’t treat those systems alike. A chatbot inventing a citation is frustrating. A clinical tool inventing a medical fact could kill someone. A biased entertainment recommendation might narrow a person’s choices; a biased government risk score could cost them their freedom. So the answer isn’t panic. It isn’t blind trust in the companies building these systems, either. The sensible approach is to match safeguards to the severity, scale, and reversibility of the potential harm. AI Can Be Wrong Without Looking Wrong Generative AI has a dangerous habit: it can present false information in polished, confident language. Researchers often call these errors “hallucinations.” A stud...
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  How Medicine Is Really Practiced: Critical Thinking, Diagnosis, and the Making of a Doctor At its heart, medicine is about wrestling with uncertainty. Symptoms rarely line up like textbook checklists, and every patient brings their own story and quirks. That’s why physicians aren’t just repositories of facts; they’re detectives, analysts, and—at their best—empathetic partners in care. What separates a seasoned doctor from someone just starting isn’t just knowledge, but the ability to think critically and make sound decisions in the face of ambiguity (BMJ Quality & Safety). The Art and Science of Figuring It Out Consider a patient who walks in complaining of chest pain. A less-experienced clinician might leap to the most obvious causes—maybe heartburn, maybe anxiety, maybe something worse. But an experienced physician approaches the problem like a mystery: they gather clues from the patient’s story, perform a physical exam, and order key tests. Maybe the pain started after exe...
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