observations: degrees of parallax, and redshift
deduction: age
(and, btw, there is evidence that the speed of light is changing, and has changed. While I have not studied it enough to understand it / think it is true / support it - I find it a fascinating topic. The speed of light has been measured multiple times, by multiple people over the years, and the later measurements of the speed of light have been beyond what many of the researchers specified as the error band for their experiments.)
And yet, using the SAME methods, researchers have NEVER measured significantly different ages.
I have indeed looked at this evidence, and all I found was an incomplete set of data. I've seen measurements from 80 years ago that are both above AND below our current measurement. Error bars are only accurate if all sources of error are accounted for -- and when you're pushing the edge of your equipment's abilities, it's not at all uncommon to make mistakes in the assumptions that go into error calculations!
In addition, to make the earlier (slower) measurements correct would mean that the speed of light were changing fast enough that it'd be easily within the detectable range of today's instruments.
Finally, if the speed of light changed -- even a little bit -- the sun would become much hotter or cooler than it currently is. Not only would this be evident in ice cores (showing a systematic increase or decrease in radiation -- much more than the current 11 year and 100 year cycles) but a shift significant enough to be detected in 1950's labs would make the Earth uninhabitable.
OK, so you reject many of the miracles of Jesus? Walking on water, changing water into wine, etc? Many of these violate our current understandings of the laws of physics....
Not at all. Jesus apparently chose to prove his divinity through these miracles. But when you claim that evidence showing great age in the geological column and common ancestry between humans and other apes is in fact evidence AGAIST these things... you're essentially positing the magical pink unicorn who created the universe last Tuesday.
Believe what you will, but don't pretend that our observations of the universe to date support your ideas! You have, in effect, created the ultimate unprovable conspiracy theory! Everything (no matter WHAT) is taken as "proof" for your hypothesis.
Maybe it's just me, but I would find it exceedingly deceptive for God to create the universe, then go back and make it look like it were billions of years old. If the guy can do anything, any way he likes, to inspire an account of creation that disagrees with the universe he has created is just nonsensical!
Of course I deny both that he inspired Genesis to be some sort of modernist ultra-factual historical account AND that the universe is less than a few billion years old. MY God is perfectly capable of creating a universe that is consistent and of writing an account of creation that conveys truth even to those who were born after the Renaissance!