Giant’s Causeway: columns made by nature
Follow one place from cooling lava and cracks to today’s coast.
Follow one place from cooling lava and cracks to today’s coast.

Annual surface temperature from CESM (T): a model estimate, not a direct observation of the past.
0 Ma: pre-industrial climate/CO₂; modern sea-level and O₂ references.
Glacial-interglacial cycles with 120m+ sea level swings. Homo sapiens spread from Africa across the globe, and most megafauna went extinct.
Annual model means · 0 Ma: pre-industrial
Present