Scientists: Lake Tahoe is regaining legendary clarity

LAKE TAHOE, Nev. – At midnight, researchers aboard the vessel John Le Conte — an old 37-foot diesel-powered salmon trawler — dropped a net into icy cold waters. What was surprising wasn’t what they caught. It’s what they didn’t: Invasive shrimp, which have long held sway over America’s most famous alpine lake, upsetting its balanced ecosystem. In a rare piece of environmental good news, the harmful predators are almost gone. In their place are helpful creatures who are safely returning to eat algae and other fine particles. Scientists say this mysterious shift may be restoring the lake’s legen...