The torrential downpour had begun. The great flood was eminent.
The ark was ready to set sail, 2 of almost every animal had already been loaded up, but it was missing a vital part of its cargo...
The man in charge of getting these animals on board was none other than Dennis Nedry.
Dennis was a smart man, and he knew he would be unable to fit two of every dinosaur aboard the ark, so he decided to bring embryos instead. The dinosaurs could later be created from said embryos.
Sadly, Dennis did not get the embryos to the ark in time as he was instead eaten by a dilophosaurus.
This is why we do not have any dinosaurs with all of the other animals in the world today.