Werent they very strong physically? AP. sure arent as strong as Deinotherium or Mammuthus sungari but I bet they would be a physically chalange. Plus, were predators already capable of traveling to earth millions of years earlier? Thats weird, they have mastered space travel millions of years ago and are still unevolved further? Weird.
Plus, would they also have hunted like Tyrannosaurus? They could only kill one of those with a plasma caster shot to the head.