Why is the “humans only use 10% of their brain” concept is untrue?

As Dr Steve Novella memorably put it (paraphrased), you never hear anyone say, “the good news is that he was shot in the 90% of the brain we don’t use.”

The truth is that we use the entire thing, but not necessarily at the same time. Bits become more or less active as you do this and that, but over the course of normal life you use all of it. The brain uses up far too high a portion of your energy budget to be allowed to go unused. Natural selection won’t allow that.


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My new iPhone keyboard.


The Great Sea Urchin Crisis

Sea urchins from the bed of the Atlantic Ocean are served in Japan on another bed, one of rice. The roe inside their spiky scalps is a delicacy, which meets the tongue with a sweet tang and wiggles down the throat like milky tofu. But the Atlantic’s sea urchins are disappearing. And a formerly $2.5 million-per-year Nova Scotian industry is disappearing with them.  
Read more. [Image: Meagan Campbell]

A fish named Skully.