Helium
Because it is lighter than air, airships and balloons are inflated with helium for lift.
(1.14 points)
| Rank | Name | Unlocked |
|---|---|---|
| 1 | Krumpel81 | 10/13/2020 16:39:42 |
| 2 | Penumbean | 12/07/2020 16:11:33 |
| 3 | megyeridom | 12/26/2020 04:43:37 |
| 4 | Nvlea | 02/07/2022 15:53:31 |
| 5 | Malone86 | 02/20/2023 19:40:39 |