There are several examples of physical evidence which exists to support the idea that giants once roamed the Earth. For example, stored in the vaults of the medical school at WITS University, Johannesburg, there is part of an upper leg bone with a hip-joint that would have stood approximately 12 feet tall. It’s been there since the early 1960’s, and was found by miners in Northern Namibia. It is one of the most precious and rare specimens available today that clearly indicate the existence of giants in Southern Africa more than 40,000 years ago.
You can view footage of that here.
Apparently, in 1883 the Smithsonian, a United States government/military led organization at the time, sent a team of archaeologists to South Charleston Mound. According to the official report, the team discovered a number of giant skeletons ranging from 7 to 9 feet tall. Some of them had a “compressed or flat-head type” which would resemble similar skeletal characteristics to those found in Egypt and South America (source).