Please take a look at these sentences
1)A lot of people have tried to find out what happened to the captain and the crew of Mary Celeste.
Why is it not "have been trying" because we still don't know the reason and people are still looking for an explaination .
2))The ship's disappearance is often linked to Bermuda triangle
Why present and not present perfect because people have been looking for an explaination for a long time and this explaination (bermuda triangle) seems to be quite old.