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| Surprise: Protons bypass hydrogen bonds but still change molecules Posted: 18 Mar 2012 11:39 AM PDT Common wisdom has it that protons only travel between molecules via hydrogen bonds: no hydrogen bonds, no proton transfer. Scientists investigating molecular components of RNA were surprised to find that protons can find ways to transfer even when hydrogen bonds are blocked. The discovery may open new opportunities for research in biology, environmental science, and green chemistry.  |
| T. rex's killer smile revealed Posted: 18 Mar 2012 07:04 AM PDT One of the most prominent features of life-size models of Tyrannosaurus rex is its fearsome array of flesh-ripping, bone-crushing teeth. New research shows that the T. rex's front teeth gripped and pulled, while the teeth along the side of the jaw punctured and tore flesh.  |
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