The New York Times is soliciting readers’ questions about the dangers — and benefits — posed by artificial intelligence.
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BAGANBAZAR GRAPHSource-attributed newsSCIENCE deskThe Trump administration had threatened to withhold some Homeland Security money unless states explored paper balloting and citizenship verification.
BAGANBAZAR GRAPHSource-attributed newsSCIENCE deskOlefin metathesis is one of the most important reactions in organic chemistry for forming carbon–carbon bonds—for example, in the production of pharmaceuticals, plastics and complex natural products. However, previous ruthenium catalysts that enable this reaction have faced a major challenge: They rapidly degrade in aqueous or biological environments, making their use in natural systems such as cells or blood extremely difficult.
BAGANBAZAR GRAPHSource-attributed newsSCIENCE deskAt the end of the last ice age, early humans crisscrossed the Americas following seasons, rivers and game, often with a trusty spear in hand. Nearly 13,000 years later, archaeologists are using those spearheads to study how America's first inhabitants understood risk.