The newly discovered fossil records suggest that mold-like single-cell organisms "set the stage" for the animal kingdom to evolve, the researchers wrote in a new report, published in the journal ...

A Canadian geologist may have found the earliest fossil record of animal life on Earth, according to a report published Wednesday in the journal Nature. Around a billion years ago, a region of ...

Being a scientist is much like being a lawyer. You painstakingly gather evidence to support an argument — though one rooted in the scientific method, not courtroom conjecture. According to new ...

Our new study reveals a different, often overlooked factor. Daily swings in oxygen levels on the shallow seafloor may have stressed early animals (the ancestors of all animal life today), pushing them ...

For more than 100 years, biologists have wondered why animals display different types of life cycles. Some species, like humans and most vertebrates, develop directly into a fully formed yet smaller ...

Test your knowledge of mammals, birds, insects, ocean life, reptiles, amphibians, and more, with these fascinating animal trivia questions with answers.

Imagine a world where the oxygen you need changes dramatically between day and night. Your world shifts from being rich in oxygen (oxic) in the day, so you have energy to hunt for food, to ...