Falling temperatures near advancing ice cliffs drive cold-weather plant life toward southern latitudes.
Notes on verification
Well-corroborated by multiple independent sources describing standard ice age climatic and ecological dynamics; consistent with established paleoclimatology. [cascade flags: wikipedia_dropped_other_sources_exist | tier=bronze indep_score=0.3 clusters=2 claim_tier=everyday]
Sources
- Ice Age - Definition & Timeline (seed:history_and_archaeology)
- https://www.ebsco.com/research-starters/earth-and-atmospheric-sciences/ice-ages (corroboration)
- https://theconversation.com/climate-explained-what-is-an-ice-age-and-how-often-do-they-happen-166652 (corroboration)