Uncategorized

  1. Lefties, righties take neural sides in perceiving parts

    A brain-imaging study indicates that right-handers and left-handers use different, corresponding neural regions to perceive parts of an object while ignoring the larger entity.

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  2. 19517

    This article overlooks an immeasurable long-term cost of whole-body computed tomography scans: the potential cancers induced by high-dose radiation. Aggressive marketing of CT scans without full disclosure of the risk is unethical and should be illegal. Nancy EvansSan Francisco, Calif.

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  3. Humans

    High costs of CT screening

    Whole-body computed tomography scans for asymptomatic disease do not appear cost-effective at this time.

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  4. Earth

    Subway air does extra damage

    Airborne particles in subterranean transit stations may be more damaging to human cells than are particles from street-level air.