CURRENT AFFAIRS

Detailed explanation-1: -Nizhnyaya Tunguska River, also spelled Nižn’aja Tunguska, English Lower Tunguska River, river in western Siberia that is a right-bank tributary of the Yenisey River, flowing through Irkutsk oblast (province) and Krasnoyarsk kray (region) of Russia.

Detailed explanation-2: -The Tunguska event (occasionally also called the Tunguska incident) was an approximately 12-megaton explosion that occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate (now Krasnoyarsk Krai), Russia, on the morning of June 30, 1908.

Detailed explanation-3: -The explosion was likely caused by the collision of an asteroid or a comet with atoms and molecules of Earth’s atmosphere. Objects of a suitable size for this type of explosion collide with Earth every few hundred years on average.

Detailed explanation-4: -Siberia, Russian Sibir, vast region of Russia and northern Kazakhstan, constituting all of northern Asia. Siberia extends from the Ural Mountains in the west to the Pacific Ocean in the east and southward from the Arctic Ocean to the hills of north-central Kazakhstan and the borders of Mongolia and China.