An ancient hammer 400 million years old In 1934, this unusual hammer was found inside a rock in Texas. An analysis of the stone concluded that the find was more than 400 million years old. The hammer is made of 97% pure iron and researchers are now wondering how primitive man was able to work the metal. Scientists are still unable to unravel the history of the artefact. «WORLD MUSEUMS & HISTORY» 233 views08:00
