Annihilation must have been cooked up in the shimmer

Rating: 3/10 (27 April 2018)

First of all, what is the shimmer. What is its purpose, aside making some people go crazy and making others turn to human gardens. Secondly why are most of the conversations done in whispers and made so solemn. What and how in the hell did Natalie Portman overcome the shimmer at the end. P.S. I did not understand the whole light house scene at all. Finally what is the point of this movie.