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Francois Xavier DeRuydts

John Punches performs a mapping measurement inside a Mount Rainier ice cave.

Eddy Cartaya, a team leader, measures ice density in a cave with Woody Peebles.

Eddy Cartaya climbs down an ice wall with the help of James Frystak, placing ablation markers to measure the melting ice over time.

Scientists Andreas Pflitsch and David Holmgren work to place a probe that measures temperature and depth at the bottom of Lake Adelie.

Expedition doctor Woody Peebles explores a previously unknown portion of a Mount Rainier cave.