110 facts
Your brain is only 2% of your body weight but devours 20% of all your energy, enough to power a dim light bulb.
You spend about six years of your life dreaming, yet science still cannot fully explain why.
You are roughly half human cells and half bacterial cells, and they produce most of your serotonin.
Up to 80% of amputees feel vivid, sometimes agonizing sensations in a limb that is no longer there.
That eerie feeling that you have lived this exact moment before has a scientific explanation in your temporal lobe.