Click the option of your choice to cast your vote.
| Moonlanding | 154 | 33.1% |  |
| Nuclear power | 36 | 7.7% | |
| Language | 33 | 7.1% | |
| Printing press | 29 | 6.2% | |
| Wheel | 30 | 6.5% | |
| Penicillin | 34 | 7.3% | |
| Harnessing Fire | 29 | 6.2% | |
| Democracy | 27 | 5.8% | |
| Electricity | 29 | 6.2% | |
| Moonwalking | 31 | 6.7% | |
| 42! | 33 | 7.1% | |