 Other experts have called into question the quality of this phenomenological approach if it fails to educate Waldorf students on basic tenets of scientific fact.One study conducted by California State University at Sacramento researches outlined numerous theories and ideas prevalent throughout Waldorf curricula that were patently pseudoscientific and steeped in magical thinking.These included the idea that animals evolved from humans, that human spirits are physically incarnated into "soul qualities that manifested themselves into various animal forms", that the current geological formations on Earth have evolved through so-called "Lemurian" and "Atlantiean" epochs, and that the four kingdoms of nature are "mineral, plant, animal, and man".