What is it with articles like these still using language like "discovered" > Guided by tips from fishermen, scientists from Colegio de le Frontera Sur explored a tropical estuary off the southeastern coast > the scientists names their new discovery the Taam ja' Blue Hole, using the Mayan language phrase Clearly the locals have known about this already. If your argument is that the difference is when it's published in…
Though I wouldn't dismiss any relevance of the year 2021, as that was when the scientists did their field work. Imagine another team did study the same hole in 2022 but published earlier, then that would be relevant.