Life on Earth is incredibly diverse, even when it comes to lifespans. While some animals live for hundreds of years, others ...

There are two basic life-cycle patterns among animals. Many animals have complex life cycles with two or more very distinct stages; metamorphosis is the usual term for the often-radical changes that ...

All animals have a life cycle, but they can be very varied and different. As part of their life cycle all animals, including humans who are animals too, have offspring which grow into adults. Humans ...

Scientists have pinpointed the 'pace' and 'shape' of life as the two key elements in animal life cycles that affect how different species get by in the world. The findings have important implications ...

Butterflies (Papilionoidea) come in a remarkable variety of colors and patterns, from the orange majesty of the monarch to the lustrous red and blue of the peacock butterfly, but all butterflies ...

nWhat kind of animal has the most species on Earth? Is it fish? Is it birds? The answer is 'insects.' To date, about 30,000 species of fish, 9,000 species of birds, 5,000 species of mammals, 6,000 ...

Learn how scientists at the Smithsonian Conservation Biology Institute can help zoo caretakers learn about the reproductive status of their animals by using frozen poop samples.