How was India discovered?

People in India have been living for more than 50,000
years. There was really no need for India to be discovered by the natives of India, at
least not for the last 50.000 years.

Also India has been a
well known country among many other countries for many thousand years. How and when
people in each of these countries discovered India is not known to historians. All that
is known is that India started trading with other countries many thousand years back.
Indications of India's trading links are available in its ancient books. For example
Mahabharata the biggest epic in the world written many thousand of
years back, has mentions of many countries and the goods that India imported from
them.

If you are talking about discovery of sea route from
Europe to India, this was discovered by Vasco de Gama in 1498.