Feces take center stage as Cutter Wood calculates 3,500 kilograms per person—enough to swamp a 20-foot shipping container—matched by 38,000 liters of urine in a 75-year lifespan. “All information you’ll need for future conversation starters,” Wood quips.

Every human, according to Wood’s book Earthly Materials, can expect to produce enough poop to overflow industrial storage, paired with a Niagara of urine. This vivid statistic transforms life’s daily business into a monumental feat of biological engineering.

In 75 years, your feces output alone could overflow a standard 20-foot shipping container—statistically proven, not just potty humor.