Why are thin people not fat? shows a study done in the United Kingdom where they have chosen random people that were thin throughout most their lives and gave them fatty foods to attempt to make them fat. The study surprisingly reveals something that may shock you and as it turns out our bodies used to store lots of fat before in cavemen times. Around that time cavemen had to worry about big reptiles, and mammals that could use them as pray so food was scarce and any and what they gathered while hunting would waste if not eaten fast.

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[Thanks George R]