Vedas are oldest scriptures in Indian ancient history, science, philosophy and culture. All Vedic Sciences are Holistic. They are an undivided part of each other as the Human is an undivided part of the Nature and Universe.
Scholars of the world have recognized the Vedas originated from Aryan culture spread all over Europe, when later they come to India via Turkey, Mesopotamia and Persia (Iran). The obvious proof for this is that all Indo-European language has Sanskrit in root of their languages. For this there are many scientific proofs which show similarity in world language; from there is also similarity in all world religions.