It is less than a decade since residents of Chebarkul, a city in Chelyabinsk oblast, Russia, witnessed the explosion in the atmosphere of a meteorite reckoned to have been a mere 20 metres across.

距离俄罗斯，车里雅宾斯克州切巴库一颗直径只有 20 米陨石在大气层中爆炸还不到十年。