Question about parents, marriage, and divorce - need sound advice?

Today my parents informed me that they were now going to sleep in different rooms. From what I can see, there's been some stress in the relationship and they've been arguing. They also told me that they were going to go to therapy again. I'd had no idea about all this until they told me. Are these signs of an impending divorce? Normally I wouldn't post something like this online, but I've done some google searches and the only websites I've found have been signs of divorce from the spousal standpoint.