The Incorruptible Saints.
According to the laws of nature, when a person dies, the body decays, becoming corrupt and withering away.
But there are saints in the Catholic Tradition whose bodies have defied all laws of science and have been preserved in ways which do not concur with the natural law.
Science is as yet unable to explain them.
There are hundreds of Saints considered to be Incorrupt. This video shows just a few.