A 13km-wide current flowing at enormous speed over a stretch of 100km. Over a million people have lost their crops, land and homes. It could get worse Subodh Varma New Delhi: Every once in a while, nature reminds humans that it is the boss. The Kosi river, which gathers water from some of the highest mountains in the world, including Everest, and enters India in north Bihar, has changed its course and shifted over 120km eastwards, going back to a course it had abandoned more than 300 years ago. In the process it has rendered useless more than 300km of embankments that had been built to control its ever-angry waters. The effect has been enormous, inundating numerous towns and villages that had not seen such floods for decades. It is a Katrina moment in Bihar