What Observations of the Martian Surface Led Lowell to the Conclusion

question 271

Multiple Choice

What observations of the Martian surface led Lowell to the conclusion that intelligent life-forms existed on Mars?

• A) melting icecaps, a network of linear features that look like canals, and varying dark surface marking assumed to be vegetation
• B) geometrical structures and patterns that are apparently the remains of buildings and cities
• C) sculpted mountains in the shape of humanoid heads, obviously carved to announce the presence of intelligent life to distant observers
• D) lakes and rivers of water flowing from polar icecaps and detected by strong specular reflection of sunlight

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