4. The Brain’s Energy Consumption
Despite making up only 2% of our body weight, the brain consumes around 20% of the body’s total energy. Most of this energy isn’t spent on conscious tasks, but on the continuous background processes that keep our minds ready and adaptable. This impressive consumption underscores how hard the brain works, even when we feel idle. It’s a testament to the relentless activity happening beneath our awareness, fueling everything from thought to memory to personality.