But what was the first animal on the planet ... During this time, Earth experienced a burst of new species during the Cambrian explosion: In just 10 million years, hundreds of thousands of ...

This stunning and unique evolutionary flowering is termed the "Cambrian explosion," taking ... the remains of ancient plants and animals have to be preserved first, and this means that they ...

The 500-million-year-old primitive fish without bones or teeth has surprisingly advanced anatomical features. “Based on the ...

The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today ... These familiar marine arthropods first arose about 545 million years ago ...

“This is the first time that life ... to the Ediacarans and triggered the Cambrian explosion—there also were changes in ocean chemistry that allowed animals to acquire hard parts (calcium ...

dramatically. It was the time of the Cambrian Explosion, an eruption of life when Earth’s very first animals began appearing in the fossil record — the ancestors of all major animal groups ...

Spiders, crabs, and other arthropods evolved from a group of animals that underwent a burst of diversity around 500 million ...

Natural History Museum, London SW7 5BD, U.K. Oxford University Museum of Natural History, University of Oxford, Oxford OX1 3PW, U.K. The trace fossil record provides important insights into the ...

So even just after the main burst of the Cambrian explosion ... how do we work out exactly when and where the first complex, image-forming eyes evolved? Molecular dating using DNA sequences of living ...