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  1. Tech

    Optics oddity challenges microchip makers

    An obscure optical effect called instrinsic birefringence has suddenly appeared as a threat to technology for making denser, faster microchips.

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  2. Earth

    Atlantic coast may be in for a pounding

    The above-average number and strength of hurricanes in the North Atlantic during the past 6 years may signal the beginning of a threatening weather trend for the United States, the Caribbean, and Central America.

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  3. 18937

    Your story on trace amines in the brain neglected to mention the most interesting and well-studied of these, the powerful endogenous hallucinogen N,N-dimethyltryptamine (DMT). DMTs role in endogenous psychosis was studied intensively in the 1960s, before research with these drugs became so controversial.