Click the option of your choice to cast your vote.
| Moonlanding | 143 | 39.9% |  |
| Nuclear power | 29 | 8.1% | |
| Language | 21 | 5.9% | |
| Printing press | 22 | 6.1% | |
| Wheel | 23 | 6.4% | |
| Penicillin | 20 | 5.6% | |
| Harnessing Fire | 20 | 5.6% | |
| Democracy | 19 | 5.3% | |
| Electricity | 21 | 5.9% | |
| Moonwalking | 20 | 5.6% | |
| 42! | 20 | 5.6% | |