text: what natural weathering has caused the old man of the mountain to collapse? i am doing this for a project and i have this long article that makes no sense at all because it only talks about the government issues of rebuilding the thing and not actually talking about what kinds of weathering and erosion destroyed it. help me, please! physical weathering, probably freeze and thaw.  (frost heaving is the lifting up of soil by frost.  in this case, the frozen water wedged the rock loose from the bedrock.) colluvial transport.  "what's up doc" is a screwball comedy (a kind of movie) about a college professor who investigates the musical tones of igneous rocks.  it stars ryan o'neal and barbara streisand.  it is very funny.