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| This scanning electron microscopy image reveals the microfossil Characodictyon, which is about 20 microns long, or one-fifth the width of a human hair, and covered in spiny plates. CREDIT: Image Courtesy of Cohen, Macdonald. |
"Fossils of tiny creatures living hundreds of millions of years ago may represent the oldest example of an organism with its own mineral coating such as is seen today on snails. The fossils indicate that the simple microorganisms were covered in plates with teethlike spines — an evolutionary feature that puzzles scientists.
The fossils, discovered in the summer of 2007 though not fully examined until now, are detailed this week in the journal Geology."
The fossils, discovered in the summer of 2007 though not fully examined until now, are detailed this week in the journal Geology."
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