Click the option of your choice to cast your vote.
| Moonlanding | 189 | 24.2% |  |
| Nuclear power | 64 | 8.2% | |
| Language | 58 | 7.4% | |
| Printing press | 60 | 7.7% | |
| Wheel | 59 | 7.5% | |
| Penicillin | 70 | 9.0% | |
| Harnessing Fire | 62 | 7.9% | |
| Democracy | 53 | 6.8% | |
| Electricity | 55 | 7.0% | |
| Moonwalking | 51 | 6.5% | |
| 42! | 61 | 7.8% | |