Ice Age

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Across
  1. 4. - Epoch of the ice age
  2. 6. - Large prehistoric animals
  3. 7. - Land bridge connection
  4. 11. - Ancient human species
  5. 12. - Thick layer of glacial ice
Down
  1. 1. - Cold, treeless biome
  2. 2. - Region with frozen landscapes
  3. 3. - Permanently frozen ground
  4. 5. - Ancient feline predator
  5. 8. - Massive ice formation
  6. 9. - Prehistoric artistic expression
  7. 10. - Large extinct mammal