If you've ever had a spiny leaf insect as a pet, or you're considering getting one, hopefully someone has warned you about this: if you put one in your enclosure, you might come back some time later ...

How do animals decide when to fight and when to walk, fly, slither, or swim away? Most research on animal conflict has focused on the short-term costs of single interactions, but a pair of behavioral ...

Fern-like bodies once covered the seafloor, some stretching as tall as a person. Yet for millions of years, the animal world ...

A study has found that the reason why the evolution of the first animals to appear on Earth was delayed for over 10 million years was due to their reproductive methods. Early animals reproduced by ...

Sexual reproduction only began to improve when early animals began facing more stress and competition ...

These unusual facts about animal sexuality expose the oddities associated with animal reproduction and sexual habits in nature. Whether it’s an eccentric animal reproductive method or a strange ...

Animals possess circadian clocks, or 24 h oscillators, to regulate daily behavior. These typically take their cues from the periodic change of sunlight and darkness. However, many animals are also ...

For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death follows mating with such consistency that it can be predicted within a ...

For some animals, reproduction comes at the ultimate cost—their own lives. While this may seem extreme, it's a natural strategy to maximize reproductive success. These species invest everything into ...

Not all species need sperm to fertilize an egg for sexual reproduction. Some species need sperm in order to induce completion of egg nucleus development, but then never use the sperm’s DNA. I describe ...