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Woe betide the rhinoceros radiologist. “Radiologists are very comfortable with dogs, cats, horses, cows,” said Dr. Michael Adkesson, the president and chief executive of Brookfield Zoo Chicago. But ask them to peer inside a critically endangered, 2,300-pound black rhino and they might quickly find themselves in uncharted territory. In 2018, …

If Frances Tiafoe has his way, every player lounge at an ATP Masters 1000 tournament will have table tennis and video games. There will be top-shelf food, “Not some dry chicken, but quality stuff that doesn’t taste like cardboard,” Tiafoe said in an interview in September, and tournament directors will …

Kinnon MacKinnon, a Canadian researcher, was only faintly surprised this spring when the website for an upcoming conference did not list his talk alongside the dozens of others. He was slated to discuss one of the most fraught topics in medicine: patients who transition to a different gender but later …