What theory is most explained? i dont know wut theory 2 belive, also how many theories r there? on how the dinosaurs died.
The one therory that is most likely to have happened is the earth was hit by a large meteor thus kicking up a large sum of dust that the sun was unable to penetrate, thus all plant life would die and in the process the dinosaurs in turn die.
The one I believe is probably the theory where they all get sick by some fever.
As I said in another reply; drought with accompanying loss of water would make a corridor for teeth disease and its othe rlife giving properties. Sea water would be affected by asteroidal impacts as well. Dubious any creature would survive even if it is a slow kill idea from drought.