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Health & MedicineBreath test could detect bad microbe
Using machines that identify component parts of gases, scientists can now detect markers of a dangerous fungal infection in the lungs of people just by analyzing their breath.
By Nathan Seppa -
AnthropologyChimps indifferent to others’ welfare
New laboratory experiments suggest that chimpanzees, unlike people, don't care about the welfare of unrelated members of their social groups.
By Bruce Bower -
PhysicsA matter of gravity
Gravity Probe B has finished its test of general relativity but results of the study won't be known for another year.
By Ron Cowen -
Questions on the Couch
A new policy statement on evidence-based practice from the American Psychological Association illustrates the intense struggle among researchers and clinicians over how best to study the effectiveness of psychotherapy in its many forms.