
From National Library of Medicine: “The structure of modern residency programs in North America originated at Johns Hopkins Hospital during the last decade of the 19th century, under the aegis and influence of William Stewart Halsted. Halsted was a surgical innovator who greatly shaped surgical practice in the 20th century. As a young surgeon in New York, Halsted was a highly skilled, bold, fast and daring surgeon who was charismatic and sociable and excelled at teaching medical students. In Baltimore, he was a slow and meticulous surgeon who was a recluse and who avoided teaching medical students when possible. Between these 2 periods, Halsted and some colleagues accidentally became addicted to cocaine, when in late 1884 they, being aware of a new report that cocaine could be used as local anesthesia, experimented upon themselves.”
A group of chimpanzees have learned how to communicate over long distances

From La Brujula Verde: “A team of researchers documented a previously unseen behavior in a group of wild chimpanzees in the forests of Guinea-Bissau, Africa: the deliberate use of stones to produce sounds, which they interpret as a sophisticated form of long-distance communication. The team, led by biologist Sem van Loon, discovered that adult male chimpanzees repeatedly struck stones against tree trunks, leaving behind piles of these rocks at the base. Van Loon explains that this behavior, which she calls “stone-assisted drumming,” is a variant of a previously known practice in these primates. But there are differences, because while traditional drumming is usually preceded by silence and then bursts into loud sounds, in this new pattern the chimpanzees first emit loud vocalizations before striking the stones against the trees again.”
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