Answer:
Tamil is the very First and Oldest Language in the World
It is proved by lot of Scientist and also accepted by most of the scientists.
Before Aryans(Sanskrit) comes to India, Dravidian(Tamil) people living in Indai with high standard. Even Aryans don't have any specific language when they comes to India. They develop their language after comes to India only. There is lot of Tamil words in Sanskrit.
Ref:
ca. 200,000 to 50,000 BC: Evolution of "the Tamilian or Homo Dravida",
ca. 200,000 to 100,000 BC: Beginnings of the Tamil language
50,000 BC: Kumari Kand am civilization
20,000 BC: A lost Tamil culture of the Easter Island which had an advanced civilization
16,000 BC: Lemuria submerged
6087 BC: Second Tamil Sangam established by a Pandya king
3031 BC: A Chera prince in his wanderings in the Solomon Island saw wild sugarcane and started cultivation in Kumari Kand am.
1780 BC: The Third Tamil Sangam established by a Pandya king
7th century BC: Tolkappiyam (the earliest known extant Tamil grammar)