Choose one other terrestrial world (Mercury, Venus, Mars, or Earth's moon) and explain which differences (or similarities) you find most fascinating about it, and why. Would you ever want the chance to visit your chosen world?
The similarity between the Earth and Mars is that they both contain water and where there is water, there is usually life. This is why scientists are often interested in Mars and the study of it, because there is the possibility of life on the planet.
Apr 28th, 2015
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