Icebergs are pieces of glaciers that break off or calve. Here, Chinstrap penguins hitch a ride, using an iceberg as a resting point.

Penguins are curious and comical. They are also fast swimmers. Gentoo penguins can swim around 22 miles per hour, faster than some research boats. Adélie penguins swim a little slower, about 10-12 miles per hour.

A sea lion rests on a chunk of ice near the Palmer Station in Antarctica.

UD students Jake Gessay (left) and Michael Cappola recover sensors from an oceanographic mooring that collected ocean current, temperature and salinity data during 2022.

UD coastal physical oceanographer Carlos Moffat (center) is working to understand the dynamics of melting glaciers and how that impacts the water circulation patterns and properties, such as salinity and temperature of the coastal oceans of Antarctica. UD students participating in the work from the Moffat Lab include (from left to right) recent undergraduate student Michael Cappola, master's students Evan Quinter and Jake Gessay, and doctoral student and Unidel fellow Frederike (Rikki) Benz.