The building of temples and great cities without modern machinery, using astronomy to predict astrological cycles and plant crops and using their language to communicate and measure time are some of the Mayans most notable achievements.<span> During a 600-year period of time, which was from 300 A.D. until 900 A.D., the Mayans made many great achievements in science, communications, engineering and agriculture</span>
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he decade had its problems. It began with the financial Panic of 1873. Railroads were growing so fast that nearly 6,000 miles were being laid down every year (17,000 miles between 1871 and 1873). With so much new construction, lending was strained and overextended.
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