What long-term effect did the failure to find canals ultimately have on the field of Martian science?

Answer

It paved the way for more rigorous searches for past habitability and water ice.

Even though the canal theory was false, the intense observational effort and resulting cultural interest acted as a catalyst, advancing observational astronomy and setting the stage for modern, more rigorous searches for evidence of past or present microbial life.

What long-term effect did the failure to find canals ultimately have on the field of Martian science?
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