Billings

A Bozeman hunter’s bird dog in eastern Montana was found with an Ixodes scapularis tick, raising concerns that Lyme disease–carrying ticks might be establishing themselves in the region.

A surprise eruption of steam in a Yellowstone National Park geyser basin that sent people scrambling for safety as basketball-sized rocks flew overhead has highlighted a little-known hazard that scientists hope to be able to predict someday.