The slowing of the eaths rotation offers an explenation for the lower measured speed of light in the past.
The data shows that the earth is spinning slower and slower. This data shows that the speed of light can be a constant after all.
The data shows that there can be an almost infinite amount of time after all.
The data totally blows away Barry Setterfields ideas behind the speed of light.
Unless I am mistaken somewhere, but no-one has corrected me up till now.