How this supercolony of 1.5 million penguins stayed hidden for nearly 3,000 years
December 13, 2018 at 09:42 AM EST
This year, scientists announced an incredible discovery by looking at poop stains in satellite images — 1.5 million Adélie penguins were living and thriving on a little patch in Antarctica surrounded by treacherous sea ice called the Danger Islands.