A study found that diseases diagnosed more often can differ by birth order. An analysis of U.S. commercial health insurance data covering more than 10 million people in two-sibling families found 150 conditions with differing diagnosis frequencies between firstborns and secondborns. Of 418 conditions with enough cases, 79 were more often diagnosed in firstborns and 71 in secondborns. Researchers cautioned the findings reflect diagnoses in records, not actual incidence.

IBM and researchers at the University of Chicago said they completed a verifiable quantum computation using 70 logical qubits, a task difficult for classical computers. The team applied a new error-correction approach and finished the calculation in about 15 minutes. The work also offers a way to verify results, a long-standing hurdle in demonstrating quantum advantage. Researchers said the logical error rate fell to about one-tenth of the physical error rate.