animals dont fukking pick up bones, let alone of a giant t-rex
, have you ever seen a dead bird then come back later and just found its bones there? When animals die they get eaten up by decomposing bacteria and scavengers like carron. The bones are left untouched, and they gradually sink into the earth as new soil is accumulated. Many times the bones arent all in the same place, so they have to dig around to find them. They usually put the bones together using the knowledge of animal anatomy mixed with common sense, they dont just find them completely in place since the cartilage is gone. The dinosaurs died because the massive amount of dust/greenhouse gases blocked a lot of the suns rays from reaching the surface, and this great change in climate killed off tons of life (i guess u could compare it to a mini ice age). The fact is is that nature is waaayyyyyy more complicated then most people tend to think it is, sometimes you just have to take their word for it as the explanation is too complicated for non-scientists to understand. Hence why most culture's idea of how the earth and nature is so off from the real one, because we oversimplified things while the reality is much more complex.