20 Items Found On Earth That Still Can’t Be Explained 14/20

14- The Coso Artifact

Photo credit: unmyst3.blogspot.com

In 1961 Virginia Maxey and Mike Mikesell were out in search of minerals in the Californian hills when one rock caught their eye. Upon cracking their discovery open the pair then found with what looked like a spark plug. Later they claimed that a geologist dated the rock to be 500,000 years old. If a spark plug is encased in a 500,000-year-old “geode,” this finding would represent a substantial scientific and historical anomaly, as spark plugs were only invented in the 19th century.