The R/V Nathaniel B. Palmer
pulled alongside an ice floe during a January-February 2009 Antarctic
research cruise, so scientists aboard could take ice cores and samples.
On the surface of the snow, lines of penguin footprints crossed smooth
lines of "belly prints" where the birds slid along on their stomachs.
WHOI engineer Scott Worrilow was on the ship, and captured the image.
(Photo by Scott Worrilow, Woods Hole Oceanographic Institution)