a: trace fossil ~
b: tracks of the organisms
What:
""A trace fossil is like the tracks of the organisms that used to be living before our time, and these ones belong to the Cambrian era, which is 400 to 500 million years ago," Dr. Mohamed El-Ghali, head of the research team told the Times of Oman."
Useful?
Writer: Dr. Mohamed El-Ghali
LCC:
Where:
Date: Feb 11 2018 10:42 AM
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