TRIASSIC
| Date | Clue |
|---|---|
| 2018-03-01 | Period when mammals first appeared |
| 2012-10-19 | Period bookended by extinction events |
| 2008-01-14 | Arizona's Petrified Forest dates from this period |
| 2001-03-16 | Period of the first dinosaurs |
| Date | Clue |
|---|---|
| 2018-03-01 | Period when mammals first appeared |
| 2012-10-19 | Period bookended by extinction events |
| 2008-01-14 | Arizona's Petrified Forest dates from this period |
| 2001-03-16 | Period of the first dinosaurs |