Penguin supercolony discovered in Antarctica
It was the guano that gave the birds away
![Adélie penguins](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/03/030318_KD_penguin_main.jpg?fit=860%2C460&ssl=1)
PENGUIN PARADE Scientists have found a giant colony of about 1.5 million Adélie penguins living on the remote Danger Islands off Antarctica.
Rachael Herman/Louisiana State University, © Stony Brook Univ.