A Ukrainian team has set a new depth record for caving by traveling 6,822ft into Krubera, the world's deepest known cave. The photo shows Alan Cressler lowering himself into the first pit below the cave entrance. Read more at BBC News(1).
Photo: Stephen Alvarez/National Geographic

1. http://news.bbc.co.uk/2/hi/science/nature/4472585.stm