| 100% | EOCENE | 6 | Epoch of 50 million years ago |
| 73% | EOCENE | 6 | Epoch 50 million years ago |
| 59% | PANGAEA | 7 | Supercontinent of 200 million years ago |
| 55% | PANGAEA | 7 | Supercontinent of 200+ million years ago |
| 49% | PLIOCENE | 8 | Epoch from 10 to 2 million years ago |
| 49% | PLIOCENE | 8 | Epoch from two to five million years ago |
| 44% | EOCENE | 6 | Occurring 40 to 55 million years ago |
| 44% | ERA | 3 | Mesozoic ___ (252 to 66 million years ago) |
| 43% | STONEAGE | 8 | It started about 2 1/2 million years ago |
| 42% | EONS | 4 | Millions of years |
| 42% | EON | 3 | Millions of years |
| 42% | AEON | 4 | Millions of years |
| 42% | DINOSAURS | 9 | Giant reptiles that lived millions of years ago |
| 39% | ERA | 3 | Mesozoic ___ (time that was millions of years ago) |
| 39% | EON | 3 | Millions and millions of years make one |
| 39% | SHIFTED | 7 | Our planet looks very different now because the tectonic plates ___ 250 million years ago |
| 38% | CANYON | 6 | Grand ___, natural wonder carved by the Colorado River about 5 to 6 million years ago |
| 37% | AGO | 3 | "Dinosaurs roamed the earth millions of years ___" |
| 37% | MOD | 3 | Fashionable, 50 years ago |
| 37% | JUBILEE | 7 | A special anniversary of an event; 50 years |
| 37% | SODASHOP | 8 | Popular teen hangout 50+ years ago |
| 37% | FEDERAL | 7 | Architecture style of 200 years ago |
| 37% | ARTDECO | 7 | Modernist movement of 90 years ago |
| 37% | OHARE | 5 | Where millions of connections are made every year |
| 36% | HAN | 3 | Chinese dynasty of 2,000 years ago |
| 36% | LIAO | 4 | Chinese dynasty of 1,000 years ago |
| 36% | TANG | 4 | Chinese dynasty of 1,200 years ago |
| 36% | LIAO | 4 | Chinese dynasty of a thousand years ago |
| 33% | ONCE | 4 | Years ago |
| 33% | URDU | 4 | Language of more than 50 million Indians |