My Favorite Conspiracy

Your favorite conspiracy can be either theory or proven. Do you prefer the believable theories like the JFK assassination or the more urban legend ones like an alive Elvis?

This is a super easy swap:
1) Pick your favorite conspiracy or urban legend
2) Write it on a postcard (or in a letter) with why it's your favorite
3) Mail it to your partner

I've made it 3 partners because many of us have more than 1 favorite. This swap is international.

Edited to add the graphic & this info: I just heard about this book this morning -
The Mammoth Book of Cover-Ups: An Encyclopedia of Conspiracy Theories