I tend to concur with SMJoe's position in that the general definition of the word, "Supernatural", is something that is "beyond natural".
The so-called, "Supernatural", delves into subject matters that transcend the laws of the physical universe. Topics, such as, God, spirituality and the afterlife, are entities that are NOT subordinate to the laws of nature. Therefore, the willingness to prove-(or affirm) the existence of such Supernatural entities, is an impossibility since the system of proof-(both historically and contemporaneously), is exclusively designed for physically based topics.
Traveling from Earth to Mars, in one second, is, at this point in our technological development and historical evolution, an impossibility. However, if and when the time comes whereby a group of Scientists-(or perhaps a brilliantly gifted Scientist), invents a technology that allows humans to conduct interplanetary travel within a few seconds, then, such an invention would not be defined as "Supernatural", but rather, as one of the most impressive developments in Aerospace Engineering and Technology.
Keep in mind that the Space program is only about 60-65 years old and the Airplane was invented (and initially flown), a little more than 100 years ago by the Wright Brothers. If, for example, we had lived in the year 1900 and were told that by the latter part of the 20th century, humankind would have actually achieved the historically lifelong dream of reaching the skies, the ridiculers, naysayers and skeptics of 1900, would have laughed and scoffed at such an idea. And yet, by the latter part of the 20th century, humankind's ability to fly to the sky and beyond, was actually achieved, thereby contradicting the ridiculers, naysayers and skeptics of 1900.
In other words, the historical and contemporary evolution of Science and Technology has and continues to defy impossibilities within the PHYSICAL realm, but NOT BEYOND the physical realm-(if such a realm even exists). Flying from Earth to Mars, at an incredible speed, would be an impressive achievement within Physical Science and would not be an example or sign of the Supernatural.