Michael Tellinger shows off what could One of the best pieces of evidence that there were giants on Earth a long, long time ago. Geologists have marvelled at this giant foot print in rough granite, about 4 feet long. It is located in South Africa, near the town of Mpaluzi, close to the Swaziland border. It is estimated to be between 200 million and 3 Billion years old because of our current understanding of the formation of granites in Earth’s history.