America's longest-serving prisoner in solitary has conviction quashed. Albert Woodfox, right, and Herman Wallace in Angola prison, in Louisiana. Woodfoxâs 1972 murder conviction was overturned when a US appeals court ruled his conviction was secured through racially discriminatory means.
Next, the Olmec created a complex drainage system. These inventions helped the Olmec survive. In addition to their inventions, they also understood many things in life, such as the concept of zero ,linear time, and gravity.
The Dawn of the Olmec. One of the accomplishments of Olmec culture was the use of trade to enrich their society. Around 1200 B.C., the great Olmec city of San Lorenzo (its original name is unknown) began creating long-distance trade networks with other parts of Mesoamerica. 1  The Olmec were skilled artisans, whose pottery, celts, statues, and figurines proved popular for commerce.