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A Neanderthal tooth shows clear signs of human intervention to treat bacterial decay, showing that the earliest dentistry began at least 59,000 years ago
Source
New Scientist
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RIKEN researchers have determined the molecular structure of an enzyme that occurs in fish. This could shed light on molecular processes in a wide range of marine organisms. The work is published in the Journal of Biological Chemistry.
The task of gently transporting a microscopic particle from one point to another along a winding path, and then bringing it back using nothing more than a single, compact chip is a challenge we set out to address in our new study, now published in Nature Communications.
As the U.S. and other countries expand clean energy, large hydropower dams, often seen as a reliable renewable solution, can come with significant environmental and social costs if not planned thoughtfully.
One of the first steps in addressing health concerns is measurement. For firefighters, one health concern is that their gear commonly contains per- and polyfluoroalkyl substances (PFAS), also called "forever chemicals" because they don't break down naturally in the environment. Since 2021, researchers at the National Institute of Standards and Technology (NIST) have been systematically measuring PFAS concentrations in firefighter equipment.
