One hypothesis suggested to explain the uniform age of the surface of Venus is that

Question

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The hypothesis suggests that the uniform age of the surface of Venus is due to periodic catastrophic melting of the entire surface, which would erase any evidence of previous geological activity. The hypothesis of periodic catastrophic melting suggests that Venus periodically experiences a global volcanic event, which melts and resurfaces the entire planet. This would explain why the surface of Venus appears to be of uniform age. This hypothesis is supported by evidence such as lack of impact craters and indications of recent volcanic activity.

One Hypothesis Suggested to Explain the Uniform Age of the Surface