A look at many of the more than 22,000 species of fish, from freshwater, to the deep ocean, to the colorful coral reef. We look at the origin of fish, how they breathe, why they have scales, and how ...

Bird watching has been popular for centuries, and songbirds have been favored subjects. During the past 30 years, songbirds have become popular laboratory animals as well. The expanded use of ...

They’re less good at remembering the names of things, like what their squeaky or stuffed toys are called. Only an elite group of gifted word-learner dogs can retain the names of hundreds of toys.