The Shunga Empire or Shunga Empire was an ancient Indian dynasty from Magadha that controlled vast areas of the Indian subcontinent from around 187 to 78 BCE. The dynasty was established by Pushyamitra Shunga, after the fall of the Maurya Empire. Its capital was Pataliputra, but later emperors such as Bhagabhadra also held court at Besnagar, modern Vidisha in Eastern Malwa. Pushyamitra Shunga ruled for 36 years and was succeeded by his son Agnimitra. There were ten Shunga rulers. The empire is noted for its numerous wars with both foreign and indigenous powers. They fought battles with the Kalingas, Satavahanas, the Indo-Greeks, and possibly the Panchalas and Mathuras. Art, education, philosophy, and other forms of learning flowered during this period including small terracotta images, larger stone sculptures, and architectural monuments such as the Stupa at Bharhut, and the renowned Great Stupa at Sanchi. The Shunga rulers helped to establish the tradition of royal sponsorship of learning and art. The script used by the empire was a variant of Brahmi and was used to write the Sanskrit language. The Shunga Empire played an imperative role in patronizing Indian culture at a time when some of the most important developments in Hindu thought were taking place.

Answer this question, if possible (if impossible, reply "unanswerable"): What was the time span of the Shunga Empire?
187 to 78 BCE