 It is now a well-known, heavily studied fact that the modern-day bird was once a very different looking animal, evolution in the form of a radical transformational adaptation, forced upon them by gradual changes in the Earth's environment, from which they once came, that being the dinosaur. We now know this to be fact, thanks to modern technology. Our capability to now scan these fossils, some found remarkably well preserved, still fortunately containing many things, which have allowed us to discover that dinosaurs had bird brains, or more accurately, birds have dinosaur brains. With current investigations even shining light upon the reality that many of these gigantic animals, including the T-Rex, once had mains made of feathers. This drastic change from the dinosaur, resulting in the vast array of creatures we see today, from the ostrich to the albatross, even to the commonly domesticated budgerigar. Yet they all share one common trait, a significant reduction in their size, even animals which survived unchanged such as the crocodile, still shrank considerably. This shrinking of said species, having been demanded of them by environmental changes. Evolutionary adaptation, as we have covered in the past, is, in the channel's opinion, in its true sense, an adaptation of specific sets of vertebrate types, the true definition of species, not as Darwinian theory posits, of leaps between such. Thus, evolution witnessed within the animal kingdom is not indicative of a shared single ancestry, but inseparable branching from specific vertebrate or phyla groups, never proven to have leaped from one to another. As such, modern-day birds could in fact be seen as the product of de-evolutionary adaptation, possibly derived from cataclysm, which deprived them of the resources needed to remain at such gigantic sizes. The reason for this digression is the channel's postulation of this same process, having once possibly occurred to Homo sapiens also. Could this explain why some of the oldest ruins are also some of the most advanced, with many remaining beyond the reach of modern man's ability to understand them? Is it possible that man once had a much higher intellect than us today, due to a far greater size cranium? Were we once giants? Just as modern-day birds were once dinosaurs. Legends and accounts of ancient giants can be found all over the world, also featuring in many ancient religious teachings. Additionally, many of the still unexplained sites of Earth regularly feature doorways, many feet, sometimes even meters above that which is required by and for humans of our modern scale. The Terracotta Army, for example, is believed by many independent researchers, including Mystery History, who have been made by a lost civilization, and their average height, intriguingly, is much taller than modern man. Many accounts exist of giants, which share similar descriptive characteristics. Red hair, double-road teeth, elongated skulls, etc. Most many accounts of red-headed giant remains actually discovered and excavated all over the world. Yet often, all that survives of these reported events is a small news article, regularly noting Smithsonian involvement in said recoveries, yet seemingly and conveniently always slipping away from the public domain. Lovelock Cave being another example, locals tell of it once being the home of a group of red-headed giants, which was eventually blocked and the giants burnt alive, a giant handprint still visible on a rock in the cave, presumably made by one of these individuals during their unpleasant demise. Yet what has to be the most compelling piece of evidence, fortunately still in view to suggest giants did indeed once exist, are footprints found all over the globe, once laid down upon sediment, now fossilized into solid stone. These footprints range in size up to a few meters in length, indicating that humans at some point in the distant past may have been even larger than many dinosaur species. We find the evidence to support the hypothesis of giant ancient humans highly compelling.