Original sentence: Samples of ectoplasm have been found to be various non-paranormal substances, including chiffon and flakes of human skin.The physical existence of Ectoplasm is not accepted by mainstream science
Edited sentence: In his 1923 book, "Our Sixth Sense", French physiologist Charles Richet voiced that ectoplasm was a "very absurd" substance, but one which deserved further scrutiny by science.Researchers using the scientific method to examine purported samples of ectoplasm have found them to be various non-supernatural substances, including chiffon and flakes of human skin.The physical existence of Ectoplasm has not been demonstrated