Born in 1861, Rudolf Steiner was an Austrian philosopher, social reformer, architect, economist and esotericist. Steiner gained initial recognition at the end of the nineteenth century as a literary critic and published philosophical works including The Philosophy of Freedom. https://atlanteangardens.blogspot.com/2019/07/unseen-worlds-and-hidden-realities.html
Very few scientists today are willing to explore metaphysics to examine life beyond ordinary perception in order to make a connection between the seen and the unseen. That said, Rudolf Steiner devoted much of his work to the task of peering behind the veil, sharing his insight into the deeper nature of life and of the world beyond, the world of the unseen.