It looks like a dinosaur. They did not have pictures 800 years ago.
It looks like modern representations of dinosaurs. You've never seen one so you really can't say it looks like a dinosaur. Also, what makes you think that particular carving is 800 years old?
There is a lot of evidence that man existed with dinosaurs.
They did not use the word dinosaur until recently.
They used to be called dragons for one.
In what way is that evidence?
It is very possible that a small part of biology is wrong and parts of all the other unscientific sciences are wrong.
The parts that are unscientific could be wrong and the parts that are scientific and follow the scientific method are right.
Which parts are you suggesting are unscientific and wrong? Be specific as to why.