What the Wikipedia talks about Vedas

[dask...@gmail.com]

The Vedas (Sanskrit:- वेद), collectively refers to a corpus of
ancient Indo Aryan religious literature that are considered by
adherents of Hinduism to be revealed knowledge. The word Veda means
Knowledge and is cognate with the word "wit" in English (as well as
"vision" through Latin). Many Hindus believe the Vedas existed since
the beginning of creation. The texts of the Vedas have several
references to specific patterns in the ancient flows of the Ganges
River, which coincide with the sites of its ancient (but now dried)
tributaries.
The newest parts of the Vedas are estimated to date back to around 500
BCE. The oldest text (RigVeda) found is now dated to around 1,500 BCE,
but most Indologists agree that a long oral tradition possibly existed
before it was written down. They represent the oldest stratum of Indian
Literature and according to modern scholars are written in forms of a
language which evolved into Sanskrit. They consider the use of Vedic
Sanskrit for the language of the texts an anachronism, although it is
generally accepted.

[Gautham]

Have the Vedas changed over time, or have they remained consistent? I
heard new things were added to the Vedas after the arrival of the
Buddha. Is this true? What changed? What was added?

Gautham