What explanation did the Catholic Church give regarding the incorruptible bodies?

We all have heard about the incorruptible bodies within the Catholic Church tradition. Was there any scientific explanation given to the Roman Catholic Church or did the Church give a scientific explanation for why we have found incorruptible bodies of some saints or people? How was it classified by the Church? Was it classified miraculous and if yes why the Catholic Church doesn't use this to prove the authenticity of faith in God and doesn't challenge the scientific community?