text: Volcano  #39;cowboys #39; who ride a ring of fire Scientists tap everything from gas-sniffing devices to GPS systems to better forecast when a mountain will stir. By Brad Knickerbocker  Staff writer of The Christian Science Monitor.
inputs: Volcano  #39;cowboys #39; who ride a ring of fire Scientists tap everything from gas-sniffing devices to GPS systems to better forecast when a mountain will stir. By Brad Knickerbocker  Staff writer of The Christian Science Monitor.