Scientists Flood Grand Canyon

A man-made flood is roaring through the Grand Canyon in a bold experiment to restore the sandbanks of the Colorado river and to save fish and plants that have been disappearing over the past 40 years. The water is being channelled into the river and down the canyon through four giant steel pipes, carrying badly needed natural sediment with it. The US$3.7m venture, supported by more than a dozen US government agencies and groups, ends tomorrow, but how well it works will not be known for months