Steve Quayle was interviewed on a classic Coast to Coast episode discussing the mountain of evidence for giants (called asuras or "titans" in Buddhism).There is a growing body of fossil evidence that is hidden away -- except in Central and South America and a jaw and enormous artifacts in the US. Quayle's book LongWalkers explores the story of a fresh redheaded giant with extra digits and two rows of teeth brought out of Afghanistan by the US military.
There is a worldwide history of giants as well as architecture built for and by them -- Sumerian, Egyptian, Mesoamerican, Judeo-Christian. Many modern giants are regarded as anomalies or simply relegated to basketball (such as Shaquille O'Neal, shown alongside his new girlfriend Nicole Alexander).
But the giants recorded in histories around the world were strong, voracious, war-like titans, the hybrid result of miscegenation with humans. Documented scientific cases of skeletons, sightings, interaction, artifacts, uncounted burial mounds, and native legends go back hundred of years by early explorers in the US and elsewhere -- many of them concerning Native American tribes of "savage" giants among ordinary nations.- Buddhism speaks not only of asuras but also nagas (which can mean reptilian or any massive creature), cannibalistic cave and forest-dwelling ogres (yakkhas), and hungry "ghosts" (pretas and bhumma-devas) who are often chimeras (crossbred animals from bestial acts).
Not only giants, but bestial fallen angels (inimical visitors from space), mermaids, and monsters are recorded in the histories of Sumerians, Aztecs, Incas, Peruvians, Native Americans, Irish, British, East Indian, Pharaohs, biblical figures, and many other "mythological" creatures. More interestingly, some small percentage exist to this day on the planet.