These structures are all that remain from a convent built near the coast of modern-day Uruguay in the 1690s. It is located in Colonia del Sacramento, a city that switched back and forth from Spanish rule to Portuguese rule several times during the seventeenth through the nineteenth centuries.
Big History is an approach to world history that takes as its subject the story of the whole of the Universe, from its creation, 13.8 billion years ago, in the Big Bang.
Before about 1800, most people in the Christian world assumed that the earth was just a few thousand years old. But growing interest in fossils and strange geological formations made some people think the earth must actually be much older.
Our sense of time has been extended into the deep past in the last two centuries or so, and particularly since the 1950s, when Willard Libby showed that you could use the breakdown of radioactive molecules such as Carbon-14 to date events thousands of years before there were any written documents