World's largest active geyser erupts for 3rd time in 6 weeks
The world's largest active geyser has erupted three times in the past six weeks at US' Yellowstone National Park in an 'unusual pattern'. Yellowstone sits atop a supervolcano that has not erupted for the last 70,000 years ago and is known for having the world's most diverse hydrothermal systems, including multicoloured prismatic springs and mudpots.