Display "helium balloon" Hot keywords Ranking history.
... balloon which was at one time estimated to be traveling at an altitude of 8000 feet when it began to lose helium ...[source]
| Date Time | Rank | Info |
|---|---|---|
| 2009-10-15 15:55:52 | 18 | ... balloon which was at one time estimated to be traveling at an altitude of 8000 feet when it began to lose helium ...[source] |
| 2009-10-15 14:56:26 | 16 | |
| 2009-10-15 13:56:17 | 14 | |