News
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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.
- Humans
High costs of CT screening
Whole-body computed tomography scans for asymptomatic disease do not appear cost-effective at this time.
- 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.
- Planetary Science
Meteorite on Mars
One of the twin rovers on Mars has discovered the first meteorite ever found on a planet other than Earth.
