If you were to condense the planet’s 4.5-billion-year history into a single calendar year, then sometime from the 18th to the 20th of November, as conventional wisdom would have it, the animal kingdom ...
Add Yahoo as a preferred source to see more of our stories on Google. Researchers uncovered the internal body parts of Cambrian fauna, such as these bits of sternums from crustaceans. - Mussini et al.
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