500-million-year-old fossil represents rare discovery of ancient animal in North America

CBD News Headlines     •     September 9, 2021, 12:00 am
Many scientists consider the "Cambrian explosion"-which occurred about 530-540 million years ago-as the first major appearance of many of the world's animal groups in the fossil record. Like adding…
openPR     •     September 11, 2021, 5:17 am
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