A thriving "hotspot" of 1.5 million Adelie penguins, a species fast declining in parts of the world, has been discovered on remote islands off the Antarctic Peninsula, surprised scientists said Friday. The first bird census of the Danger Islands unearthed over 750,000 Adelie breeding pairs, more than the rest of the area combined, the team reported in the journal Scientific Reports. {snip} When the Landsat data originally suggested the presence of hundreds of thousands of penguins on the islands, she thought it "was a mistake". "We were surprised to find so many penguins on these islands, especially because some of...