The Universe is about 13.7 billion years old.At its beginning it looked nothing like it does today.Yet,everything in today's Universe did exits in some form back then.It all started with the Big Bang, a kind of explosion that would not only go on to produce all the matter in the Universe but also marked the start of time.
The desire of European merchants to control the trade in luxury goods from Asia- silk, cotton, and spices- combined with the technology advances in shipbuilding and navigation led to a wave of long-distance voyages of exploration that redrew the map of the globe between the 15th and 18th centuries.

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