Diving during the Ordovician period is depicted in a fascinating clip featuring Nigel Marvin. It shows a “what if” scenario of scuba diving with ancient sea creatures like Sea Scorpions and Orthocones. Although thrilling, the idea of diving back in time raises questions about extinct species that might still exist today, a concept known as Lazarus taxon. While entertaining, this prompts a conversation about the mysteries of marine life and the possibility of discovering creatures long thought extinct.