It's not fair to compare the science of today with the science of 500 years ago. For one, we follow the scientific process when conducting research. A scientist forming a hypothesis, evaluating data and identifying problems will make more meaningful discoveries than someone making wild claims by boiling the guts of birds.
Also, the scientific community today is less hindered in its research by the church than scientists 500 years ago.
And who says religion never changes? Churches have split, people have made different interpretations of sacred texts and religion has played different parts throughout the centuries. Surely today's Christians don't practice the same religion as the early Christians.
We can be pretty sure they will say the same thing in 500 years about our modern science. Don't let you modern-day ego get the best of you.
And who says religion never changes?
I realized that was a can of worms when I posted it. Better put: in the last 2000 years science has changed a lot more than religion.
Not fair you say? Well, if we take into account all the scientists that ever existed, 99% of them are still alive today. Five hundred years ago science did not exist. Science is a recent phenomenon and a method which was not adopted until near the turn of the twentieth century.