In mammals, males are usually stronger and more competitive than females. Males also show greater inequality in reproductive success—the number of offspring they produce—than females. In spotted ...

When a male pearly razorfish is snatched from the sea, a female is forced to transition their sex too early. Scientists say ...

Research suggests that human monogamy reflects interactions among biology, culture, and environment rather than a fixed ...

With its thick, curly coat, the Mangalitsa looks like a cross between a pig and a teddy bear. Often called the “sheep pig,” this heritage breed is famous for its woolly look, rich marbled meat, and ...

Cannibalism is a taboo topic for humans. Many are therefore puzzled when they hear that animals eat their own kind. Yet in ...