In or near Iioo B.C., Chou Kung, an able mathematician, determined with surprising accuracy the obliquity of the ecliptic; but his attempts to estimate the sun's distance failed hopelessly as being grounded on belief in the flatness of the earth.
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Through the centuries, others that contributed to the I Ching include the Duke of Chou, King Wen and Confucius.
According to Captain Stanley Flower, director of the Zoological Gardens at Giza, Cairo, Egypt, the ancient Egyptians kept various species of wild animals in captivity, but the first Zoological Garden of which there is definite knowledge was founded in China by the first emperor of the Chou dynasty, who reigned about iioo B.C. This was called the "Intelligence Park," and appears to have had a scientific and educational object.