The Tyrannosaurus Rex, for instance, could have been prone to a specific disease that would render it impossible to co-exist alongside humans. The disease, in this case, could prove impossible and intractable to maintain or tame the animal in an environment controlled by man.

Can AT REX be tamed?

Despite being a different sub-species of Tyrannosaurus, everyone I've met still refers to them as a "Rex" or a "T-Rex". ... Taming a Tyrannosaurus is without a doubt the goal for any warlord or warring tribe. Tyrannosaurus is a fierce battle companion.

Can a human out run at Rex?

rex is only restricted to brisk walking and cannot really run. The research conducted by William Sellers, a palaeontologist from the University of Manchester and his team, it has been concluded that a T. rex can probably scale around 12 miles an hour. If they tried to go any faster their bones would give up.