How many hydrothermal features are in Yellowstone?
10,000. That is roughly half of all the hot springs, geysers and mudpots known on Earth.
How close would your guess have been?
In the game we ask it like this: “How many hydrothermal features bubble away inside Yellowstone National Park?”
Type a number — scored exactly the way a round in the game is.
The answer
10,000



