Passage Summary: Humans used lamps in caves for a very long time, but for some reason, we find way more lamps from the end of that time period than from the beginning.

Reasoning: Archaeological evidence shows that while lamps were used throughout the Upper Paleolithic, the vast majority of discovered lamps are concentrated in the late period associated with the Magdalenian culture.

Analysis: The core of this paradox is the discrepancy between the duration of lamp usage and the uneven archaeological record. To resolve this, we need information that explains why the later period left behind more evidence or why the earlier evidence disappeared. Since this is an 'EXCEPT' question, look for the one answer choice that fails to provide a reason for this lopsided distribution. The correct answer will likely be a neutral fact that doesn't explain why the Magdalenian period is so overrepresented.