| No. | Bet | Duration | Stakes | Predictor | Challenger |
|---|---|---|---|---|---|
| 317. | No human will set his or her foot on Mars and return safely to earth before 2050. |
42 years 02007-02049 |
|||
| 343. |
15 years 02008-02023 |
||||
| 681. |
6 years 02015-02020 |
Predictions that Schwieder has challenged.
| No. | Bet | Duration | Stakes | Predictor | Challenger |
|---|---|---|---|---|---|
| 351. | One or more space agencies will send a manned mission to Mars by 2035. |
27 years 02008-02035 |