The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today. Among them were the chordates ... a huge number of fossils.

left fossils of the trails they made as they moved through the Precambrian mud. Life was flourishing long before the Cambrian "explosion". The question of how so many immense changes occurred in ...

FROM 508 MILLION YEARS AGO TO TODAYPreserved in the Burgess Shale of British Columbia, the worm Canadia spinosa was part of an explosion ... chordates in the Cambrian such as Pikaia gracilens (the ...

517-Million-Year-Old Cambrian Fossils Indicate Earliest Known Example ... This finding agrees with the Cambrian explosion—a period between 541 and 485 million years ago that saw an unparalleled ...

Fossils of Ambulocetus, found in ancient estuary sediments, suggest it lived both on land and in water, bridging the gap between terrestrial ancestors and modern whales. The Cambrian Explosion ...

The researchers analyzed over 200 fossil specimens, revealing an increase in shell thickness in response to predation. This adaptation suggests an evolutionary arms race, where prey strengthen their ...

Vertebrates are thought to have emerged during the Cambrian explosion around 520 million years ago ... He points out that the fossils seem to be missing a notochord—a rod typically found behind the ...

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 ...

An exceptionally well-preserved collection of fossils discovered in eastern ... 550-520 million years ago during an event called the Cambrian Explosion. Many of these early fossils are simple ...

Researchers have uncovered the oldest known example of an evolutionary arms race in the fossil record ... often touted as a major driver of the Cambrian explosion, especially with regard to ...

The fossils here record an explosion of life around 540 million years ago, during the Cambrian period, known as the ‘Cambrian explosion’. He explains a speculative theory that the evolution of ...