Stunning video shows Antarctic killer whales appearing to use icebergs as scratching posts, possibly to exfoliate their skin

• National Geographic said it captured the first footage of killer whales rubbing up against an iceberg.
• The orcas may be using the iceberg to exfoliate their skin, which also had a build up of algae.
• The orcas also migrate thousands of miles potentially just to molt their skin, scientists say.

Orcas living in the freezing waters of Antarctica have been captured in footage rubbing up against icebergs in what could be an innovative skincare technique.