OK, here it is. What makes you think the Universe is expanding? Well, when you look at the sky, everything looks to be moving away. In fact, the farther something is from you the faster it moves away. Imagine a ballon covered with dots, you are one one of the dots. Standing there, all of the other dots move away from you as the balloon expands. The more distant dots move away faster. Thus, it looks like the Universe is expanding.
How do you measure this. Well, light is coming at you from those dots, but if the dots are moving away from you, the light seems to be going slower when it hits you...it is shifted toward the red spectrum, thus the name red shift.
The article describes an old idea actually - the so-called tired light idea. This idea is that light slows down as it travels. It has no experimental support but it would explain why light from objects that are farther from you appears to be moving slower even if the Universe is not expanding. The light has been travelling longer, and slows down more. I do not know the current status of the tired light idea, whether it was been rejected. However, the constancy of light is very fundamental to the way physicists view the Universe.
And finally, none of these ideas are meant to disprove creation, they are meant to explain the things we see in nature. But that is what it is about. I'd be happy to be corrected by someone more in the know....
I can correct one thing:
Well, light is coming at you from those dots, but if the dots are moving away from you, the light seems to be going slower when it hits you...it is shifted toward the red spectrum, thus the name red shift.
It doesn't seem to be going slower. It's still traveling at the speed of light. But the frequency is stretched out, thus it looks red. Conversely, when the source of light is moving toward you, the frequency is shifted into the blue part of the spectrum.
>I do not know the current status of the tired light idea, whether it was been rejected.<
Behold:
"Errors in 'Tired Light' Cosmology":
http://www.astro.ucla.edu/~wright/tiredlit.htm