nemesis juggernaut
Lets use an example that we do know of. Tropical plants have been found on Spitsbergen island, which is well into the arctic circle. Now, do we interpret that evidence to mean that earth was once wholly tropical or is that interpreted as that region was once closer to the equator and drifted from continental shifting?
Since there is evidence available for the latter
{
Svalbard Geology
but none for the former then I guess the former is wishful thinking