Asteroids have been known to occasionally enter our atmosphere and cause damage to our planet in the past. When this happens, the offending space rock has the potential to send dust flying into the air and blocking out the sun. This can cause a sudden change in climate, famines, wars, or even an extinction. Because of this, scientists are keeping constant watch over what happens in outer space in case a stray asteroid decides to head our way. Many unexpected collisions with asteroids the human race has experienced in the past are listed below. . 1490: In China, a large asteroid destroyed the city of Chiling-yang and killed approximately ten thousand people.
. 1908: In Tunguska, Siberia, an asteroid measuring in at 50 meters in length killed
. 1908: In Tunguska, Siberia, an asteroid measuring in at 50 meters in length killed