Have you ever wondered what animals are really thinking when they sense you nearby? Here's the thing: while we hike, drive, or simply exist in shared spaces, countless creatures are working overtime ...

With three hearts, blue blood, and the ability to squeeze through a space the size of their eyeballs, octopuses are said to be like aliens on Earth. The new National Geographic docuseries, "Secrets of ...

Add Yahoo as a preferred source to see more of our stories on Google. A fox and an otter stand together on a city street crosswalk illuminated by glowing blue and orange lights at night.© A-Z Animals ...