[cheryl j (OP)]

I was looking at a beaver dam a while ago,standing on it, actually. And there were some really big logs in it, which I realize float, but I would think they would still be hard to drag down the shore, into the water, and manuever them around. Plus there were also very large rocks on top to hold things down. Do two beavers move these rocks, like two guys moving a couch?

(I think I may have posted this question before but I cant find it.)

[Don_1]

How's this for a Beaver dam!

They just beaver away at it for ages. Look at this site for some pretty good info: http://fohn.net/beaver-pictures-facts/beaver-dams.html

[imatfaal]

Don - I couldn't access the link directly - but found if I googled "Worlds-biggest-beaver-dam-can-be-seen-from-space"  the torygraph article with amazing picture was the first article

[Mazurka]

Wow, that is not something I had thought about before, but that article was fascinating and that massive dam is impressive. 

I must say that the statement "can be seen from space" amuses me - particularly when resolution for the latest earth observation satellites is <50cm...