The sciences of archaeology and linguistics have been applied to the origins of Greek mythology with some interesting results. Historical linguistics indicates that particular aspects of the Greek pantheon were inherited from Indo-European society (or perhaps both cultures borrowed from another earlier source), as were the roots of the Greek language. Prominent Sanskritist Max Müller attempted to understand an Indo-European religious form by tracing it back to its Aryan, Vedic, "original" manifestation. In 1891, he claimed that "the most important discovery which has been made during the nineteenth century with respect to the ancient history of mankind [...] was this sample equation: Sanskrit Dyaus-pitar = Greek Zeus = Latin Jupiter = Old Norse Tyr". Philologist Georges Dumezil draws a comparison between the Greek Uranus and the Sanskrit Varuna, although there is no hint that he believes them to be originally connected. In other cases, close parallels in character and function suggest a common heritage, yet lack of linguistic evidence makes it difficult to prove, as in the case of the Greek Moirai and the Norns of Norse mythology.