Adrienne Mayor writes about the Si-Te-Cah in her book Fossil Legends of the First Americans[1]. She suggests that the 'giant' interpretation of the skeletons from Lovelock Cave and other dry caves in Nevada was started by entrepreneurs setting up tourist displays and that the skeletons themselves were of normal size. However, about a hundred miles north of Lovelock there are plentiful fossils of mammoths and cave bears, and their large limb bones could easily be thought to be those of giants by an untrained observer. She also discusses the reddish hair, pointing out that hair pigment is not stable after death and that various factors such as temperature, soil, etc can turn ancient very dark hair rusty red or orange, though it may not account for the Paiute tradition of red-haired people existing here before the cave was excavated.
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en.wikipedia.org]
Another entrepreneurial attempt to make money from the biblically verified giants in the earth
6:4 There were giants in the earth in those days; and also after that,
pity they didn't stick with the original really
6:4 The Nephilim were in the earth in those days, and also after that,