News
- Health & Medicine
Lung Scan: CT may catch some treatable cancers
Computed tomography (CT) scans seem to catch lung cancer early in smokers, but questions remain about the screening procedure.
- Paleontology
Mastodons in Musth: Tusks may chronicle battles between males
Damage in the fossil tusks of male mastodons suggests that the creatures engaged in fierce combat with rival males at a certain time of year each year of their adult lives.
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Med-Start Kids: Pros, cons of Ritalin for preschool ADHD
A long-term study indicates that 3- to 5-year-olds with attention-deficit hyperactivity disorder who are prescribed the stimulant Ritalin often show behavioral improvements but also display greater sensitivity to the drug's side effects than older children do.
