Witness a fascinating wildlife moment involving one of the world's largest tortoise species.

African gray foam-nest treefrogs (Chiromantis xerampelina) are common across the savannas and dry forests of southeastern Africa. Despite their unremarkable outward appearance, these small animals ...

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

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 ...