22. Why have people looked to Mars over other planets as a place that once could have contained life? Organisms found on the surface indicate that a greater life-form may have once existed. Fossils found in rock reveal species that once roamed the planet. Streams of running water have been found on the surface. Mars's surface features indicate that water did exist there at one time.

22. Why have people looked to Mars over other planets as a place that once could have contained life? Organisms found on the surface indicate that a greater life-form may have once existed. Fossils found in rock reveal species that once roamed the planet. Streams of running water have been found on the surface. Mars's surface features indicate that water did exist there at one time.

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter8: Earth As A Planet

Section: Chapter Questions

Problem 26E: With the information from Exercise 8.25, you can calculate the average age of the ocean floor....

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