Tanka is an underground reservoir built to store rain water. The tanka usually has a square or rectangular shape and is constructed from clay or stone. A wall is built around the tanka so that rain water can collect in it.

Narayani Devi Verma (She had played a key role in the Bijolia movement and also took many steps to promote women's education. While she was very active in the Praja Mandal Movement, her commitment to Gandhian ideals resulted in her active efforts towards tribal welfare and Dalit upliftment.

Scraper is not considered a principal tool of the early Stone Age. Hand axes, cleavers, and choppers are examples of tools that were commonly used during the early Stone Age for various purposes, including cutting and processing materials. Scraper tools are more commonly associated with the later stages of the Stone Age and were used for tasks like scraping and smoothing surfaces.

Canada-United States Border. Stretching a massive 8,893 km, Canada and the United States share the longest border in the world.