Quotation from: The Notebooks of Leonardo Da Vinci

Written by: Leonardo da Vinci


If the deluge had to carry shells three hundred and four hundred
miles from the sea, it would have carried them mixed with various
other natural objects heaped together; and we see at such distances
oysters all together, and sea-snails, and cuttlefish, and all the
other shells which congregate together, all to be found together and
dead; and the solitary shells are found wide apart from each other,
as we may see them on sea-shores every day. And if we find oysters
of very large shells joined together and among them very many which
still have the covering attached, indicating that they were left
here by the sea, and still living when the strait of Gibraltar was
cut through; there are to be seen, in the mountains of Parma and
Piacenza, a multitude of shells and corals, full of holes, and still
sticking to the rocks there. When I was making the great horse for
Milan, a large sack full was brought to me in my workshop by certain
peasants; these were found in that place and among them were many
preserved in their first freshness.

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