http://img689.imageshack.us/img689/5359/sany0767.jpg http://img175.imageshack.us/img175/2831/sany0768.jpg http://img190.imageshack.us/img190/1125/sany0769r.jpg http://img8.imageshack.us/img8/3254/sany0770z.jpg
I would say Bear. What type of area were you in when you found it? Woods? Mountains? Taxidermy store?
how the hell do you expect us to determine the origin of a claw/tooth from 4 pictures of the same thing with no other info whatsoever? haha, we aren't zoologists or anything
Your quote concerning humans being the only creature that kills for sport is not exactly true. Wolves, Orca's (and other Cetacains) have been documented killing and then just playing with the carcasses of their victims.
Its deffinantly not a mountain lions. Is it hollow? measure it out? area you found it in? what was around it?