I photographed three pairs of icebergs floating in the Lemaire Channel off the Antarctic Peninsula. But are they gently passing one another, or near the point of collision?

Of this pair, one resembles a serving of soft ice cream and the other is a study in perspective with the tiny specks on top actually being penguins!

Although we often think of icebergs as being white, they also come in many shades of blue and green. Their colors depend on the composition of the ice including factors such as air bubbles, organic and inorganic matter, and whether the iceberg is composed of seawater or rainwater.

These two glide through the water, seemingly in opposite directions and perilously close together. Since over 90% of each berg is under water, are they already colliding?