Researchers have discovered a supercolony of more than 1.5 million Adélie penguins living on the remote Danger Islands off the coast of Antarctica. The previously unknown penguins were discovered when satellite photos in 2014 showed a significant amount of penguin poop on the Danger Islands, giving researchers a pretty good hint that a bunch of the adorable birds probably live there. Considering how long it took for humans to find this colony of penguins, maybe we don’t know our planet as well as we think we do.