Click the option of your choice to cast your vote.
| Moonlanding | 195 | 22.3% |  |
| Nuclear power | 71 | 8.1% | |
| Language | 59 | 6.7% | |
| Printing press | 74 | 8.4% | |
| Wheel | 66 | 7.5% | |
| Penicillin | 94 | 10.7% | |
| Harnessing Fire | 78 | 8.9% | |
| Democracy | 59 | 6.7% | |
| Electricity | 56 | 6.4% | |
| Moonwalking | 55 | 6.3% | |
| 42! | 69 | 7.9% | |