The Fatima and Garabandal Marian Apparitions, or any one of the other three apparitions suggested underneath would be excellent targets for rv studies.

https://udayton.edu/imri/mary/c/chronological-table-of-marian-events.php

The above link of The Chronological Table of Marian Events from the University of Dayton has compiled a list of Marian apparitions since the beginning of Christianity, and there are hundreds of them!

Why so many apparitions? Why do they always seem to take place before wars or when man is about to commit some atrocities?

Who is Mary? What is she trying to tell us? Is she an ET? What is the role of ETs in earth religions? What is the purpose of religions on earth?

A rv study on Marian apparitions on earth might be able to provide some answers to the above questions.

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1. Fatima, Portugal, 1917. Two videos shown. The first one is short but nicely summarizes the events at Fatima. The second video is longer with more details and a strong catholic undertone.

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2. Garabandal, Spain, 1961-1965

3. Zeitun, Egypt, 1968 – 1970

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4. Akita, Japan, 1973

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5. Medjugorje, Bosnia, 1981