Natasha was especially interested in <span>dinosaurs; </span>however, Jorge wanted to check out the huge collection of precious gems. You need to use a semicolon before however because you are connecting two independent clauses into one compound. Natasha <span>gazed into a replica of a cooking fire and began to imagine sounds:a crying baby, the persistent click of stone on stone involved in making scraping tools, and the thunderous cry of a mastodon. You need to use a colon to indicate that a list will ensue. </span> Hoped I Holped