11 amazing facts about the human brain

The brain is the most complex organ in the body.Scientists think that human brains are actually shrinking over time.Contrary to the popular myth, you actually do use most of your brain.Your brain can't actually feel pain.The part of your brain that lets you see is actually nowhere near your eyes.You use your brain all day and night, but how much do you really know about it' Scientists have been trying to unravel the mysteries of the human brain for centuries, and theyve uncovered some pretty fascinating stuff about how our grey matter really works. Here are a few truly incredible facts about the human brain. The human brain isn't actually fully mature until age 25.According to the University of Rochester Medical Center, our brains don't really finish growing up until we're about 25 years old. Recent research suggests that people younger than 25 often process information with a part of the brain called the amygdala, which is the part of the brain involved in managing emotions.In contrast, people over 25 tend to use their prefrontal cortex, which is the seat of rational decision-making and judgment. Scientists believe that important connections between these two areas of the brain aren't fully formed until our mid-twenties. Scientists think that human brains are actually shrinking over time.As University of Wisconsin anthropologist John Hawks explained to Discover magazine, human brains have actually lost about 150 cubic centimeters over the past 20,000 yearsthat's amounts to a chunk the size of a tennis ball. Scientists aren't totally sure why our brains are getting smaller, but some think that as our bodies and nervous systems became smaller, our brains sized down to match. Others believe that the shift has more to do with lifestyle and habitat changes.The human brain is mostly water and dehydration can make it work poorly.Need another reason to stay hydrated' The human brain is mostly made of water. In fact, your brain is roughly 75% water and contains about 2% of the total water in your body. If you were to put your brain on a scale, it would weigh about 3 pounds. Disturbingly, being dehydrated by just 2% can impair your attention, memory skills, and other cognitive functions. See the rest of the story at Business Insider
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