From a lion's mane jellyfish in the Arctic Ocean to explorers preparing to dive deep into the dark waters of the Frasassi Caves in Italy, National Geographic's 2023 Pictures of the Year is a dynamic ...

In the ethereal blue glow of the water, a huge shape swept toward them. Around 30 feet long, with four billowing arms and a domed head, the creature was larger than the tourists’ personal submersible.

Deep-sea jellyfish might not have a brain, but they don’t aimlessly drift around the world’s seas. In fact, they seem to stick within their set territory with an incredible sense of order. In a new ...