World's tallest geyser keeps erupting, and scientists aren't sure why

World's tallest geyser keeps erupting, and scientists aren't sure why  CNN Yellowstone geyser, world's largest, shows strange eruption patterns  USA TODAY Yellowstone geyser is experiencing unusual eruptions. Scientists can't explain why.  Chicago Daily Herald Steamboat Geyser - Yellowstone National Park (U.S. National Park Service)  National Park Service Unusual eruptions at world's largest active geyser in Yellowstone  ReutersFull coverage