Today I encountered a very bizarre web site claiming to explain the extinction of the dinosaurs using a change in the gravitational constant.
Who *is* this guy? It doesn't strike me that he has any scientific training (certainly not in palaeontology), but he presents a lot of speculations as facts, and makes several glaring mistakes. He doesn't even say who he is.
That's one of the many problems with the internet. Anybody can just write whatever they please, and it can instantly be viewed by millions. At least books go through a process.