Studying wildlife or any other aspect of Antarctica on the ground is challenging since humans can basically work in the frigid environment only about three months each year.
But by combining several kinds of high-definition satellite images and comparing them with the limited ground-based observations, U.S. and British researchers were able find out how to differentiate between shadows, penguins and even their plentiful poop.
That technique uncovered seven previously undiscovered colonies and revealed almost 600,000 penguins living in the Antarctic environment.
Results of the study were published in the journal PLoS One.
Photos: Top: British Antarctic Survey