The Aryans originated in South-Central Asia and invaded parts of India around 1000-500 BCE. They spoke an early form of Sanskrit and lived as semi-nomadic herders. During the Vedic period, Aryan culture combined with indigenous Indian cultures. The Aryans acquired war chariots and weapons, allowing them to dominate much of northern India militarily and establish the caste system. They introduced their male-dominated culture and gods. Under the Mauryan dynasty, India developed advanced knowledge in fields like medicine, mathematics, and metallurgy. Women had varying social roles and freedoms depending on region and caste.