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  1. Health & Medicine

    Zapping Wayward Cells: Therapy sheds light on transplant complication

    Ultraviolet light can curb graft-versus-host disease, a common complication of bone marrow transplants, a study of mice shows.

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  2. 19408

    I described everything in this article almost 50 years ago in The City and the Stars (1956, Harcourt, Brace, and World). See chapter 6: “He set up the matrix of all possible integers, and started his computer stringing the primes across its surface as beads might be arranged at the intersections of a mesh. Jeserac […]

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  3. Math

    Primal Progress: Pattern hunters spy order among prime numbers

    The population of prime numbers includes an infinite collection of arithmetic progressions.