A hidden ecosystem of giant sea spiders, octopuses, and other stunning sea creatures shows how life can flourish even when sealed off from the surface by a thick layer of ice. A large sponge ...

“We didn’t expect to find such a beautiful, thriving ecosystem. Based on the size of the animals, the communities we observed have been there for decades, maybe even hundreds of years.

At first, the satellite image of Lake Titicaca, which sits high in the Andes Mountains on the border between Bolivia and Peru, looks normal. But zoom in, and you’ll see a riot of reds, yellows and ...