... scientists were able to manipulate plant DNA. The process has allowed researchers to create thousands of plants inexpensively ("Cloning" 1). Despite all the knowledge of cloning, the first animal clones were formed only one hundred years ago. During the late 1800s, Hans Dreisch created the first cloned animals. His experiment involved the use of sea urchins, which have large embryos. Dreisch took the two-celled embryo of an urchin and vigorously shook the embryo in a beaker full of sea water. The embryo eventually split and each cell became a separate sea urchin. In 1902, Hans Spemman used a single hair to separate the two-celled embryo of a salamander. He later removed a single cell from the sixteen-celled embryo. Both embryos eventually developed into identical salamanders. Later, Spemman proposed "what he called a 'fantastical experiment'- to remove the genetic material from an adult cell, and use it to grow another adult". ...

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