You can read if it is possible to recover from Parkinson's in a book by John Coleman. There are also web sites, such as Road to Recovery, reporting on numerous people who did recover. So was Sister Marie's recovery a miracle? Yes, that is the nature of religion.
I like to balance these man-made miracles with some natural ones, and a report out of the Australian Antarctic Division shows that icebergs calving off from that continent, are, in fact, rich in iron, accumulated over geological time frames from falling dust (no, not from Mars). What happens is that this metal provides fertilization to initiate phytoplankton growth, leading to growth of higher order sea life. This "miracle" works because there is a deficiency of iron in our oceans.
Martin Experiment conducted in 1993 and a follow-up effort in 2009 that iron, indeed, stimulates growth in the ocean. That's John Martin on the right. Interestingly enough, by taking carbon dioxide out of the ocean, this also leads to a reduction of this gas in the atmosphere, which would reduce global warming. How's this, then, for a double miracle? When Mount Pinatubo erupted in 1991, considerable iron dust was deposited into our seas, resulting in a decline in atmospheric carbon dioxide and an increase in the oxygen level.
Blue Revolution speculates that the high nutrients available from the cold water effluent from grazing ocean thermal energy conversion (OTEC) plantships could well also stimulate growth of life in the ocean, and, perhaps, also reduce global warming. It is possible that some iron would need to be added, but this high concentration of this "free" natural fertilizer is at the exact Redfield ratio to promote growth because these minerals came from life that flourished near the surface, and decomposed at depth. Additional details providing the big picture for popular reading can be found in some of my Huffington Post articles. To the left is a drawing of a possible first at-sea OTEC prototype being designed by Lockheed Martin for Honolulu.
So what is a miracle? Whatever you want it to be.