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Hermit arthropods 500 million years ago?

Achilles Tang

By Achilles Tang,
in General Reefkeeping_

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Achilles Tang

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When animals first crawled onto land, one of the greatest obstacles they had to contend with was figuring out how to breathe. No longer bathed in oxygen-rich marine waters, their gills would surely have dried out. Scientists have analyzed fossils from 500-million-year-old rocks that show one way these early pioneers may have dealt with this problem--the first terrestrial animals carried a shell on their backs.

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