Castlepook’s Thirty-Three-Millennia Fauna
Archived: 20 September 2026
Around 33,000 radiocarbon years before present, Ireland was a cold, open, low-sea-level landscape within wider north-west Europe, not a modern island. Castlepook Cave, County Cork, preserves over 2,000 Late Pleistocene bones deposited across millennia, including mammoth, giant deer, reindeer, brown bear and spotted hyaena. These remains demonstrate a diverse but fluctuating fauna, shaped by climate, predators, water and cave processes. A marked reindeer femur may indicate stone-tool butchery and Ireland’s earliest human presence, but remains unconfirmed and cannot prove settlement. No evidence supports permanent communities, institutions or occupation. Castlepook chiefly records an environmentally changing Ice Age frontier before maximum glaciation.