Water is the key element of life, but new information is coming to light on the element which we thought we were so familiar with: information which could potentially reimagine our tree of life. That is the belief shared by the advocates of a surprising theory called "water memory". For Prof. Luc Montagnier, water has the ability to reproduce the properties of any substance it once contained. Water would have the ability to retain a memory of the properties of the molecules. What if Alzheimer's, Parkinson's, autism, HIV and even cancer could be treated thanks to this controversial theory?