| 1 | To keep your bearings in a desert sandstorm is impossible. | |
| 2 | All dust storms on Mars, no matter what size, are powered by sunshine. | |
| 3 | But this may have been residue from an aerosol storm earlier this week. | |
| 4 | The crew went there to hunt for dark dust-devil tracks on the ground. | |
| 5 | The dust devil tracks appeared bright in contrast to the rain-darkened background. |