Photosynthesis is about the plantiest thing on Earth. The little green thieves manage to pull it off anyway.

Whales have a history that is among the strangest and least-understood of any animal—and barnacles might be the key to unlocking their secrets.

Whale sharks can dive more than a mile deep. Marine biologists are still trying to figure out why they bother.

Summers in Alaska’s Denali National Park and Preserve are short seasons, followed by even shorter (yet colorful) autumns, then long, cold winters.