The cave on the other side of the crack was large ... In places, layers of perfectly clear ice show where winter rains pooled on the glacier or filled up crevasses and then re-froze when the ...

Winter in Alaska has waterfalls frozen mid-cascade, ice caves so blue they look unreal, and lakes so clear you can skate ...

Massive chunks of ice had fallen into the cave entrance, blocking their way ... "We are now living in a time of very clear existential threats — a time when we need an army of citizen scientists ...