shouldn't the first question be...
What has changed in the Universe?
If those supernovae are caused by the same physical phenomena, under the same circumstances, creating the type... What Has Changed?
Whether we're up for heat-death or contraction, or gravity-pit oblivion is ultimately a minor, if not moot question compared to this, given that it's based on several constants which should be, well.... constant.. as far as current theory goes. If there's two populations based on distance = time, we either measured wrong, or *something* happened around the border between the two.
Biting the hand that feeds IT
