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- Earth
Ancient hot spell is linked to copious carbon dioxide
A mineral that formed in some lakes during a lengthy and particularly warm period in Earth's past suggests that atmospheric concentrations of carbon dioxide were at that time at least triple those found in today's air.
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Reading this article prompted me to consider the biological significance of fever and our impulse to reduce it when given the choice. Isn’t it possible that an increase in cancer incidence could be related to the prevalence of fever-reducing medications or the overall reduction in illnesses that cause fever? Wendy GordonAustin, Texas
- Health & Medicine
Warming Up to Hyperthermia
By notching up a tumor's temperature a few degrees, scientists are boosting the power of radiation, chemotherapy, and cancer vaccines.
