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  1. Genetic Code Cracking

    Can’t tell a base pair from a Bosc pear? The National Library of Medicine offers an impressive, informative Web site devoted to the intricacies of genetics and molecular biology. Its science primer explains basic concepts, from bioinformatics to gene maps. The site also points users toward helpful resources on topics such as the human genome. […]

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  2. Math

    Guessing Secrets

    Analyzing an intriguing variant of the familiar game of 20 questions provides insights into Internet communication.

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  3. Math

    Rainbow Randomness

    The branch of pure mathematics known as Ramsey theory concerns the existence of highly regular patterns in sufficiently large sets of randomly selected objects, whether they are gatherings of people, piles of pebbles, stars in the night sky, or sequences of numbers generated by the throw of a die.