Your brain may be bigger than Einstein’s. (At 2.71 pounds, his weighed 10% less than average.) Your memory may be better than his too. (Seems he couldn’t remember his own phone number.) And yet in the field of theoretical physics, Einstein most likely had you beat.

Why was Einstein’s brain so good at some things and not others? Why is yours?

These are just some of the countless questions about the human brain that, so far, no one has answered. Indeed, in general, “we just don’t know that much about the brain yet,” says Ed Boyden, an associate professor at the MIT Media Lab and McGovern Institute. “Maybe that is the most surprising fact — how little we know about the brain.”

Here are some of the basic facts — along with some of the mind-boggling.

Google Effect You’re less likely to remember information if you know you can easily access it again. You’re more likely to remember something if you say it out loud. 2,500,000 Gigabytes of storage space in your brain. The top-of-the-line iPhone 7 has 256. An iPhone 7 with wireless AirPods. (Apple / TNS) 86 billion Interconnected neurons in your brain that send information to one another at speeds of up to 268 mph. 20% The amount of energy supply your brain gobbles up. If your brain cells ever get too hungry, they may actually start eating one another. You only feel pain if your brain tells you that you do. And it only tells you that you do when it receives a message from a pain receptor somewhere in your body. Woman in pain. (Staras / Getty Images/iStockphoto) 60% The percentage of the dry part of your brain that is made up of fat. In fact, your brain is the fattiest organ you have. It contains about 25% of all the cholesterol in your body. Your brain synthesizes most of its own cholesterol. 75% Your brain needs water. In fact, it’s almost 75% water, and if you get too dehydrated, it can’t perform at the top of its game. That means you get a little dumber temporarily. Your brain is very wrinkly The wrinkles let it cram more surface area into a smaller space. (David Fleetham / PBS) 66 The number of seconds it takes for a new case of Alzheimer’s disease to develop somewhere in the U.S. By 2050, the rate is predicted to double. 2/3 The approximate proportion of Americans with Alzheimer’s who are women. It’s widely believed that males are better at math than females. But research shows that notion just doesn’t add up. (Mel Melcon / Los Angeles Times)

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