Hi all, In all the discussion so far I guess I've made the assumption that the reason you are planning to use a bowling ball is for easy identification on the ground, but what about dropping an iron shot put at close to the same time to see if the impact is different? I confess to not having the physics background of some of you, but it seems to me we would want to get as close to the real thing (i.e., iron meteorite) as possible, no? Perhaps a chunk of rock that closely resembles the density of a stony meteorite as well...? Does a large sphere of hard rubber/plastic/resin (or whatever it is bowling balls are actually made of) impact the same way a smaller sphere of iron or igneous rock would? Would a bowling ball disintegrate on impact, or remain intact? Anyone have a clue? I guess it would help if I knew how bowling balls were made -- heck, maybe they are iron inside...? Wondering out loud... Rich __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com