Mark A Roeder

Ancient Egyptian civilization is so grand our minds sometimes have difficulty adjusting to it. It lasted 3,000 years, longer than any other on the planet. Its Great Pyramid of Cheops was the tallest building in the world until well into the 19th century and remains the only Ancient Wonder still standing. And it was the most technologically advanced of the ancient civilizations, with the medical knowledge that made Egyptian physicians the most famous in the world.

Mohenjo-daro was the largest city of the Indus Valley civilization, one of the most advanced civilizations ever to have existed, and the most ancient prehistoric urban site on the Indian subcontinent. It was a metropolis of great cultural, economic, and political importance that dates from the beginning of the 3rd millennium BCE. Although it flourished between approximately 2500 and 1500 BCE, the city had longer-lasting influences on the urbanization of the Indian subcontinent for centuries after its abandonment.