All seeds have the umbilical cord, which breaks when the seed is ripe. And in like manner they have matrix and secundina, as is seen in herbs and all the seeds which grow in pods. But those which grow in shells, such as hazel-nuts, pistachio-nuts and the like have the umbilical cord long, and this shows itself in their infancy.
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I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.
Although human ingenuity may devise various inventions which, by the help of various instruments, answer to one and the same purpose, yet will it never discover any inventions more beautiful, more simple or more practical than those of nature, because in her inventions there is nothing lacking and nothing superfluous; and she makes use of no counterpoise when she constructs the limbs of animals in such a way as to correspond to the motion of their bodies, but she puts into them the soul of the body.
Nature appears to have been the cruel stepmother rather than the mother of many animals.
Of the original phenomena, light is the most enthralling.
A bird as it rises always sets its wings above the wind and without beating them, and it always moves in a circular movement.
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