The Hunt for Life on Mars by Donald GoldsmithMy rating: 4 of 5 stars
To some of the JSC researchers, the ovoids' shapes resembled those of microfossils, the fossilized remains of bacteria so small that their sizes are measured in microns. But the ovoids at the edges of the carbonate globules are even smaller-smaller, in fact, than any known living organisms or microfossils on Earth. Does this mean that the ovoids are too small to have been alive? No one knows for sure. If living organisms had the size that the ovoids do, we could reasonably talk of nanofossils.
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