Millions of years ago, rivers ran in Antarctica through craggy mountain valleys that were strangely similar to the modern European Alps, Chinese and British scientists reported on Wednesday. In a study published by the British journal Nature, the scientists described a vast terrain that had been hidden beneath ice up to two miles thick for eons, until new imaging technology recently uncovered them. "The landscape has probably been preserved beneath the ice sheet for around 14 million years," the paper said. The imaging revealed "classic Alpine topography" similar to Europe's Alps, showing that rivers had once existed on Antarctica and...