PNAS

PNAS (Proceedings of the National Academy of Sciences) is not directly mentioned in either of the provided news articles. Therefore, it's impossible to provide a summary about PNAS based solely on this information. The articles discuss unrelated topics: one focuses on using hair samples to personalize cancer therapies based on an individual's circadian rhythm, and the other details the radioactive leakage from a sunken Soviet nuclear submarine. Without any connection to PNAS, any attempt to create a summary about the organization would be speculative and inaccurate.