search hole
Googling things and following link after link after link endlessly, seemingly falling into a black hole of tangents.
I was supposed to be researching space robotics then I started reading about neurophysiology in space which led to a brain atlas with links to articles about the ventral prefrontal lobe and then I found this blog post about neuroimaging in that area and a debate about science journalism...hours later I realized I was in deep in a search hole.