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 Olmec culture was the first great Mesoamerican civilization, developing along Mexico's gulf coast from about 1200-400 B.C. before going into a mysterious decline. The Olmec were very talented artists and sculptors who are today best remembered for their monumental stonework and cave paintings.