Some of the earliest Mesoamerican cultures included the Olmecs, the Mayas, and the Aztecs. The Olmecs lived near the Gulf of Mexico, in “swampy, lowland river valleys.” Water drains made out of stone, hieroglyphic writings, and a calendar, were a few of their achievements. The Mayas lived in the Yucatan Peninsula of Mexico today. Their priests were extremely good mathematicians and astronomers. They developed a system of mathematics with 20 as the base, accurate calendars, and were the first Native Americans that developed a writing system. The Aztecs lived in Central Mexico. They were a very advance civilization with a network of canals, bridges, and causeways. Some of their achievements included chinampas, artificial floating islands used for farming, and a calendar.
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Answer:
Explanation:
Charles Darwin & Alfred Russel Wallace. A visit to the Galapagos Islands in 1835 helped Darwin formulate his ideas on natural selection. He found several species of finch adapted to different environmental niches. The finches also differed in beak shape, food source, and how food was captured. Natural selection is the mechanism suggested by Darwin for evolution. Because resources are limited in nature, organisms with heritable characteristics that favor survival and reproduction leave more offspring than their peers, causing the traits to become more common over generations.
