| Description | Saber-tooth |
|---|---|
| Creation | Hypothesized—one concrete fact is known |
| Feature | Color-changing |
| Mistake | Unsustainable design causes short lifespan |
| Description | Saber-tooth |
|---|---|
| Creation | Hypothesized—one concrete fact is known |
| Feature | Color-changing |
| Mistake | Unsustainable design causes short lifespan |