Collagen was extracted and analyzed for bulk stable isotopes of carbon-13 (δ 13 C) and nitrogen-15 (δ 15 N) and compound-specific isotopes of individual amino acids. Radiocarbon dating provided ...

The results were published in the Proceedings of the National Academy of Sciences (PNAS). The researchers analysed oxygen isotopes from 14 samples from the Moon and carried out 191 measurements on ...

This study offers important insights into KIF1A-associated neurological disorder (KAND), a group of neurological disorders connected to KIF1A, a microtubule-based motor protein responsible for axonal ...

During a period called Snowball Earth, the entire planet was covered in ice. In a recent PNAS study, Shuhai Xiao of Virginia Tech and colleagues studied stable isotopes of lithium in dolostones to ...

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