It sounds like something from a science fiction movie. Specifically it sounds like something from the Hitchhiker's Guide to the Galaxy, but this time it is true and fact really is a heck of a lot stranger than fiction. Dolphins are currently warning us that this planet is terminal. In other words, it is going to be destroyed in rather short order.
Unlike Douglas Adams' tale, however, earth is not being destroyed by sinister Vogons to make way for a galactic bypass. No, this time the earth is set to be destroyed because the inhabitants have failed to meet the minimum standards of the Interplanetary Homeowners Association for the past ten thousand years. In other words, we have become a blight in the neighborhood, driving down property values of all those around us.
When will earth be destroyed? That's a good question, but, when you see that all of the dolphins have disappeared, you'll know that the time is near.
"So long and thanks for all the fish!"