
Hey, it's Marco! You ever wonder what causes muscle soreness after exercising (it's not what you think) or why your nose gets runny when it's cold outside? Did you know that Humans have more than five senses? Why do guys hurt when they're kicked in a certain "private" area? And why is it nearly impossible to tickle yourself? Here are 10 interesting facts I bet you weren't aware of... Read on!
The Human Body
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