A problem arises when we consider an expanding universe. Suppose everything in the universe were to double in size. The distances between galaxies would double, the size of the Earth would double, the size of all our meter sticks would double, and so on. It would seem to an observer (who will also have doubled in size) as if nothing had happened at all. So what do we mean by saying the universe expands?
The author is trying to fool gullible and unknowledgeable people.
Why do post things that are so easily refutable by anyone with even a tiny bit of science education? Read this article and watch the movies. It does a pretty good job of explaining expansion in layman's terms. If you want something more scientif, then I can certainly oblige.
Expansion is not a theory. It is a fact that is measured on many objects on a daily basis.
Do you even have the faintest clue what is meant by inflation?