Pleistocene ice age Pleistocene last ice age ice age ice age ice age 12,000 years ago ice ages Pleistocene the Late Pleistocene mid-Pleistocene Epoch ice age Pleistocene Pleistocene [epoch] Pleistocene ice ages Pleistocene 12,000 years ago ice age Pleistocene mid-Pleistocene Epoch Pleistocene 12,000 years ago ice age last ice age ice age ice age a layer of ice Pleistocene Epoch Pleistocene Pleistocene mid-Pleistocene Epoch ice age Pleistocene Epoch Pleistocene Epoch 12,000 years ago Pleistocene Epoch 12,000 years ago ice age ice ages megafauna of the Pleistocene last ice age ice age megafauna of the Pleistocene ice age