Getting the lead out

About 250,000 children in the United States have high levels of lead in their systems, say the Centers for Disease Control. Children under the age of 6 are especially vulnerable to lead poisoning, which can severely affect ...

Conserving for nature's sake or our own?

The value of nature in conservation may seem simple, straightforward and fundamental. Yet a persistent question arises: Should we conserve nature only for humans or also for its own sake as well?

New catalyst yields more accurate PSA test

Say you've been diagnosed with prostate cancer, the second-leading cause of cancer death in men. You opt for surgery to remove your prostate. Three months later, a prostate surface antigen (PSA) test shows no prostate cells ...

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