Bihar shares its eastern border with West Bengal. The Ganges River forms a natural boundary between these two states in many parts.

Bihar receives an average annual rainfall of approximately 1000-1200 mm. The rainfall pattern varies between the plains and the Himalayan foothills in the north.

Jharkhand was created as a separate state on November 15, 2000, by separating 18 districts from Bihar. This significantly reduced Bihar's geographical area.

Total length of Ganges = 2525 km. Length in Bihar = 2525 × (1/3) ≈ 841.67 km ≈ 842 km. The Ganges flows through Bihar for a significant portion of its course.

Khudiram Bose, a revolutionary from Bihar, was imprisoned in the Cellular Jail (Andaman) for his role in nationalist activities. He became a symbol of anti-colonial resistance.

Muzaffarpur is famous for litchi cultivation and is known as the 'Litchi Capital of India'. The city has a long history of litchi production and export.

Pataliputra was the capital of the Mauryan Empire under Ashoka and other rulers. It was one of the largest cities in the ancient world.

The Kosi River is often called the 'Sorrow of Bihar' due to its devastating floods and unpredictable course changes that cause extensive damage.

Bakhtiyar Khilji, a Turkish invader, destroyed the famous Nalanda University in the 12th century, burning its libraries and ending its scholarly activities.

Bodh Gaya is the sacred site where Siddhartha Gautama (Buddha) attained enlightenment under the Bodhi Tree, making it one of the holiest places in Buddhism.