A pink sponge, photographed at an aquarium today, is not unlike one of the first life forms that appeared in the Precambrian era. Photograph by Joel Sartore, National Geographic Photo Ark The ...

The Precambrian encompasses 86 percent of the history of Earth. As its name implies, this includes all of geological time prior to the Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian ...

The fossil, which is only a few centimeters long, is the oldest member of the Ecdysozoa, and interestingly the only one known from the Precambrian period. Researchers noted that it is an ...

The Royal Tyrrell Museum has a new exhibit that explores fossils from the Precambrian era. It explains how those fossils evolved in the Cambrian era about 500 million years ago, when the surface ...