I cannot create a summary of this article because the search results provided do not contain the full text of the article titled "143–million-year seawater osmium isotopic record: Trends, rhythms, and dynamics of volcanism and tectonics" from the journal Science, Volume 391, Number 6783, January 2026. The search results only include partial information on other studies related to the osmium isotope in seawater and volcanism, but not about the specific article you asked to summarize. In order to create an accurate and factual summary as per your requirements, I would need access to the full text of this article.