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Several possible explanations, some flawed, have been proposed for this effect:

Several possible explanations, some flawed, have been proposed for this effect:

In 2010, creation scientist Dr. D. Russell Humphreys wrote regarding his explanation for the Pioneer anomaly:

In 2010, [[Creation science|creation scientist]] Dr. D. Russell Humphreys wrote regarding his explanation for the Pioneer anomaly:

{{cquote|The only non-standard assumption I used was that the matter of the cosmos is limited in extent, with a fair amount of empty space beyond the matter—an assumption supported by the [[Bible]]. With those relatively modest beginnings, I was able to explain the Pioneer anomaly — it’s due to a change in the ‘fabric’ of space. In fact, this anomaly could be the first local manifestation we have observed of the expansion of the cosmos, and the first evidence that expansion is occurring in the present, not just the past.

{{cquote|The only non-standard assumption I used was that the matter of the cosmos is limited in extent, with a fair amount of empty space beyond the matter—an assumption supported by the [[Bible]]. With those relatively modest beginnings, I was able to explain the Pioneer anomaly — it’s due to a change in the ‘fabric’ of space. In fact, this anomaly could be the first local manifestation we have observed of the expansion of the cosmos, and the first evidence that expansion is occurring in the present, not just the past.