Disclaimer: The F-words in this post are added purely for comedic value.
I want to contribute to the research. Surely we should know the
type of the giants we are looking for, so I analyzed the possibility of jungle giants, city giants, desert giants, forest giants, ice giants, plain giants and pygmy giants.
JUNGLE GIANTS. There can't be jungle giants, because we have evidence for people who live in the jungles and they are FUCKING SMALL! If you want to survive in the jungle, you had better not be too big. If there ever were jungle giants, they obviously evolved into pygmy giants:
Here's a photo of jungle giants that have evolved into pygmy giants.
Here's another photo of the pygmy giants. There are plenty of these photos, because the pygmy giants are real.
CITY GIANTS. There can't be city giants, because then their existence would be FUCKING OBVIOUS!
DESERT GIANTS. There can't be desert giants, because they would dehydrate and starve. Maybe they have humps like camels? Any real life that struggles in desert environments is in the form of tiny creatures. The further into the desert you go, the tinier the creatures get.
ICE GIANTS. There can't be ice giants, because THOR FUCKING KILLED THEM! Also, Inuits, the real ice people are -- once again -- FUCKING SMALL!
An ice giant walks on ice. *CRACK* *SPLASH* The ice giant is dead.
This is the main reason why there are no other ice giants than Inuits.
PLAIN GIANTS. These giants starved to death, because the prey saw and heard them from afar. They tried to use berries and mushrooms as food, but there just wasn't enough to sustain the large body size. A sad story, really. Smaller body size was once again an advantage that the giants failed to realize.
FOREST GIANTS. See: Jungle giants.
PYGMY GIANTS. These actually exist. It is not a coincidence that they are small. The bigger folk did not survive in the jungle as well as their smaller siblings. The slightly smaller man struggling in the jungle was able to fuck more and spread his smallnessness in the form of his offspring. He did it slightly more efficiently than his slightly larger brother until after many generations the genes that make the people small are prevalent in the gene-pool of the population.
Plot twist:
The "normal-sized" man is the giant!
PYGMY ICE GIANTS. These actually exist. They are called Inuits. Just like the pygmy giants in the jungle, over many generations, natural selection has made these giants small. It is not a coincidence that there are pygmy ice giants instead of giant ice giants. I recommend watching the astonishing documentary film about the Inuits. You can see how the life-style in the environment and the small body size fit together and you understand how a large humanoid would be less efficient at surviving (and thus less efficient at fucking) in the harsh cold environment:
Nanook of the North (1922)
Judging from how the various human tribes in jungles, ice plains and other environments have evolved to be small, it seems that being small is an advantage and the genes for smallness would naturally preserve better than the genes for largeness in any population.
Conclusion: We are the giants. The reason why we are large is that due to modern life-style (beginning from the introduction of agriculture) there is less selection pressure for small body size. The opposite is true for hunter-gatherers. When you have fields and domesticated animals, natural selection no longer cares whether you are small or not, you are still able to survive and fuck efficiently under the city lights. You also fail to see that you are a giant, because your own size is the norm that you are used to.
Feel free to use these findings as your material, ars.