What does it look like underneath a lake covered with Antarctic ice?

McGill University doctoral student and scientific diver Michael Becker shares the icy underwater view in this New York Times video under Lake Untersee, Antarctica.

In the blog post, he also explains the prep behind keeping the dive safe — note that yellow tether that keeps divers in communication with their team and leads them back to safety — and what they are looking for in the lake sediment: precisely described data and carefully collected samples that help illuminate the history of the lake and its organisms. Brrrrr.

from Scientist at Work.