In his book To Utopia and Back: The Search for Life in the Solar System, Professor Horowitz noted that the findings from these missions clearly resolved the question of whether there is life on Mars or on any other planet in our solar system.
होरोविट्‌ज़, मंगल ग्रह के १९६५ - ७६ मॅरिनर तथा वाइकिंग मिशन से संबद्ध वैज्ञानिक, पहुँचे ।