in...........Although..............comparatively.........what............exploded...........over.................atmosphere...................nothing...........If ----- Nội dung dịch tự động từ ảnh ----- It weighed about 10,000 tons, entered the exploded (21) at a speed of 64,000km/h and (22) a city with a blast of 500 kilotons. But on 15 February 2013, we were (23) lucky. The meteorite that showered pieces of rock over Chelyabinsk, Russia, was_ small, at only about 17 metres wide. the damage was_ (24) many people were injured by falling glass, (26) had happened in Siberia nearly one hundred years ago. Another relatively small object (approximately 50 metres in diameter) (28) it had exploded over a city such as Moscow or London, millions of people would have been killed. (25) compared to (27) in mid-air over a forest region, flattening about 80 million trees.