First assumption you make is that mankind was not as "smart" as we are today.
Second assumption you make is that God could not explain His universe to man in a way man would understand it.
The Bible is full of science and astronomy. All you have to do is read.
ealgeone: "The Bible is full of science and astronomy."
Sure, but it's the "science" and astrology of ancient Babylon or Egypt, having nothing to do with what we today call "natural science".
In fact, while the Bible is not "anti-science", it's main point -- which it hollers loudly from the hill-tops -- is that God is greater than nature itself, or any natural-science understandings we may develop of how nature works.
In short: the Bible tells us that God is above, beyond and outside of nature, and therefore of our natural-science explanations.
That's why this article's author never says "science proves", but only that it suggests with signs pointing in God's direction.