Sanskrit is part of a family of languages known as Indo-European. Some Indian languages such as Assamese, Gujarati, Hindi, Kashmiri and Sind hi, and many European languages such as English, French, German, Greek, Italian and Spanish belong to this family. They are called a family because they originally had words in common. For example, the words 'matr' (Sanskrit), 'ma' (Hindi) and 'mother' (English) had the word 'ma' in common.

The people at Inamgaon ate grains like barley, wheat, rice, pulses, millets, peas and sesame. Bones of a number of animals, many bearing cut marks that show they may have been used as food, have also been found. These include cattle, buffalo, goat, sheep, dog, horse, ass, pig, sambhar, spotted deer, blackbuck, antelope, hare and mongoose, besides birds, crocodile, turtle, crab and fish. There is evidence that fruits such as ber, amla, jamun, dates and a variety of berries were consumed by the people.

The burials have some common features as:
(i) The dead were buried with distinctive pots, which are called Black and Red Ware. 
(ii) Moreover tools and weapons of iron and sometimes, skeletons of horses, horse equipment and ornaments of stone and gold are found in these burials.

About 2000 years ago, Charaka was a famous physician who wrote a book on medicine, Charaka Samhita. There he states that the human body has 360 bones. This is a much larger number than the 200 bones that are recognised in modern anatomy. Charaka arrived at this figure by counting the teeth, joints and cartilage.

The correct order is:
(i) finding suitable stone
(ii) breaking boulders
(iii) shaping stones
(iv) transporting stones
(v) digging pits in the earth
(vi) burying the dead
(vii) placing stones in position

Chariots were important because they were main means of transport. The other famous means of transport was the carts.

Other languages used in the sub-continent belong to different families. For instance, those used in the North-East belong to the Tibero-Burrnan family. South Indian languages like, Tamil, Telugu, Kannada and Malayalam belong to the Dravidian family. The languages spoken in Jharkhand and parts of Central India belong to the Ausrro-Asiatic family.

(i) Iron metal was used for the preparation of the above equipments.
(ii) Megalithic equipments were found from burials

In the Rigveda, there are two groups who are described in terms of their work - the priests, sometimes called brahmins, who performed various rituals, and the rajas.
(i) At that time, rajas did not have capital cities, palaces or armies, nor did they collect taxes. Generally, sons did not automatically succeed fathers as rajas.
(ii) In the Rigveda, to describe the people or the community as a whole, the words - 'jana' and 'vish' were used.
(iii) Several vish or jana are mentioned, for example, the Puru jana or vish, the Bharata jana or vish, the Yadu jana or vish, and so on.
(iv) The people who composed the hymns described themselves as Aryas and called their opponents as Dasas or Dasyus.

The silent sentinels behind the story of the megaliths were as follow:
(i) The big stones or the stone boulders are known as megaliths which were carefully arranged by people, and were used to mark burial sites.
(ii)The practice of erecting'megaliths began about 3000 years ago, and was prevalent throughout the Deccan, South India, in the North-East and Kashmir.
(iii) Some of the megaliths can be seen on the surface, other megalithic burials are often underground.
(iv) Archaeologists often find that a circle of stone boulders or a single large stone standing on the ground, are the only indications of burials.
(v) The burials have some common features as the dead were buried with distinctive pots, which are' called Black and Red Ware. Tools and weapons of iron and sometimes, skeletons of horses, horse equipment and ornaments of stone and gold are also found.

From the Rigveda we know that there was no regular army at that time. There were assemblies where people met and discussed matters of war and peace. Most men took part in the battle. They chose leader who were brave and skilful warriors. Leaders used horse chariot in the battlefield. Battles were usually fought for land and water. Sometimes battles were also fought for cattle and people Capturing people the rajas made them as dasas (slaves). The power and strength of the Raja depend on land and cattle they had. Initially the struggle was between the Arya tribes and non-Arya tribes As the domination of Arya tribes increased, the power struggle between the Arya tribes seem to have begun.