What two major developments allowed Song China to trade by sea?

Chinese goods that flowed north in large quantities included tea, silk, copper coins (widely used as a currency outside of China), paper and printed books, porcelain, lacquerware, jewelry, rice and other grains, ginger and other spices.

the court ruled that a state law that banned abortions (except to save the life of the mother) was unconstitutional

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john smith was the first englishman to sail around the world. francis bacon served as attorney general and lord chancellor of england. he took up aristotelian ideas, arguing for an empirical, inductive approach, known as the scientific method, which is the foundation of modern scientific inquiry.