| Answer | Crossword Clue |
|---|---|
| ICEAGE | It ended about 10,000 years ago |
| LIMABEAN | It was domesticated in the Andes about 4,000 years ago |
| IRONAGE | Period of human history that began about 3,000 years ago |
| STONEAGE | It started about 2 1-2 million years ago |
| DENEB | It will be the North Star in about 8,000 years |
