ANSWERS: 2
  • No. Nothing material has returned, to do so would require some sort of rocket power to launch the probe back into space towards Earth. However, rovers have conducted experiments on Martian soil and sent the results (data) back to Earth.
  • Nothing humans have sent to Mars has ever returned, however we have found pieces of Mars on Earth. http://astrobiology.arc.nasa.gov/news/expandnews.cfm?id=1235

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