Say “chia” and most people think of a novelty item: Chia Pets. The kitschy clay figurines sprout leafy coats when smeared with a paste of moistened chia seeds and faithfully watered. These days the ...
At the height of their power, the Aztec Empire supported a population of up to 3 million in the Valley of Mexico, and many of their largest cities had populations exceeding 100,000. This was not easy, ...