On a recent excursion to Antarctica, San Francisco-based filmmaker and designer Alex Cornell, 30, caught a rare glimpse of an iceberg's underside.
As we got closer, it became clear that it was a pure jade iceberg. We had a naturalist onboard the zodiac boat with us, and he explained what we were seeing and why it was so exciting. To us, everything we came across was exciting (penguins! icebergs!), but this certainly stood out as a rare sight — something I had never seen before in real life, or even subsequently in photos.