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living fossil: Word of the day for February 12, 2019

living fossil , n :
Any species discovered first as a fossil and believed extinct, but which is later found living; an organism that has remained unchanged over geological periods. Any living species which very closely resembles fossil relatives in most anatomical details. English biologist, geologist, and naturalist Charles Darwin, who coined the term and who is best known for his contributions towards the science of evolution, was born on this day 210 years ago in 1809.
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