The document discusses various landforms and geological features found on Mars, and compares them to similar features on Earth. It provides evidence that liquid water once existed on the surface of Mars, including images of Martian pack ice and measurements showing the Martian poles melted 20 million years ago. It also notes that erosion by wind is actively shaping the surface of Mars today, as seen in dune formations with multiple layers of smaller sand bedforms.

2. Essay: The above picture displays an alluvial fan-like structure. What planet is it found on, and how was it formed? Give evidence for your argument.

3. Our knowledge of the solar system is changing

4. Space travel is changing

5. Our knowledge of Mars is changing

6. Water on Mars

9. Deformation Bands of Mars and Earth (precursors of faults) "This study provides a picture of not just surface water erosion, but true groundwater effects widely distributed over the planet," said Suzanne Smrekar, deputy project scientist.

10. Martian pack ice (a) Earth’s Antarctica (b) Counting of craters indicates Martian pole melted 20 million years ago. Liquid water once existed on the surface of Mars.

12. Martian Winds

17. Hebes Chasma: Grand Canyon of Mars

24. Martian Avalanche