 | Curiosity science team member Sanjeev Gupta explains how rounded pebbles spotted by the rover are convincing evidence of an ancient stream-bed on Mars. Credit: NASA/JPL-Caltech | Views: 3  1 ratings |
| Time: 02:55 | More in Science & Technology |
| Curiosity science team member Sanjeev Gupta explains how rounded pebbles spotted by the rover are convincing evidence of an ancient stream-bed on Mars. Credit: NASA/JPL-Caltech | Views: 3 1 ratings |
| Time: 02:55 | More in Science & Technology |
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