For decades, scientists have scoured the skies and planetary surfaces for evidence that life might exist beyond Earth. New ...

Chemical etching (also called photochemical etching, photo etching, or chemical milling) is a precision manufacturing method ...

Per-and polyfluoroalkyl substances (PFAS), long lasting human-made chemicals built from carbon and fluorine, are now used in thousands of everyday products. Scientists worry because many of these ...

“Organic” might be the most abused word in the English language. Chemists, farmers, and marketers all use it—and none of them mean the same thing. The result is a label that can make Oreos, cigarettes ...

(Beyond Pesticides, July 30, 2025) The definition of per- and polyfluoroalkyl substances (PFAS), also known as “forever chemicals” due to their persistence, continues to be debated in regulatory ...

Medics say more nuanced policy needed with greater regulatory distinction between harmful PFAS and essential fluoropolymers used in medical devices Per- and polyfluoroalkyl substances (PFAS), often ...

A team of internationally renowned experts in per- and polyfluoroalkyl substances, or PFAS, are calling out individuals within the International Union of Pure and Applied Chemistry, or IUPAC, ...

Leading chemists have warned against efforts to narrow the scientific definition of PFAS. In a statement published by the American Chemical Society, they defend the current OECD definition as ...

Twenty of the world’s top experts in per- and poly-fluoroalkyl substances (PFAS) have serious concerns about a project to redefine this family of environmentally persistent chemicals that is being led ...

Chemical pneumonia is an unusual type of lung irritation. Pneumonia usually is caused by a bacteria or virus. In chemical pneumonia, inflammation of lung tissue is from poisons or toxins. Only a small ...