Feature
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EarthParticular Problems
Toxicologists and chemists are forging a new field called nanotoxicology as they grapple with assessing the safety of engineered nanoparticles.
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EarthBuried Treasures
Geologists have long understood the chemical processes that sculpt many cave formations, but they've only recently come up with a physical model that explains some of their shapes.
By Sid Perkins -
Health & MedicineUltrasound’s New Focus
No longer limiting the use of sound waves to diagnostic medicine, researchers are studying high-intensity focused ultrasound as a treatment for uterine fibroids, breast cancer, prostate cancer, and other cancers.
By Ben Harder -
The Bias Finders
A simple test of unconscious preferences has achieved great popularity among psychologists and, at the same time, sparked heated debate over how it works and whether it shows widespread implicit biases against black people.