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Trilobite
classification as arthropod
1948: Paleontology, Invertebrate
Arthropod
evidence of gradual evolution
extinction
Paleozoic life
picture of trilobite fossils
use as index fossil
1948: Paleontology, Invertebrate
Important progress in this field of geological and biological science was made in 1948, although few individual events, like Professor Ralph Chaney's (University of California) report of living fossil trees in China, were recorded in the daily news. The trees represent plants which were presumed to...
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