Your poo is brown because of something called stercobilin, which is produced by bile from your gall bladder being metabolized in your intestines. Without this it would be white and grey like bird mess!

Your poo is brown because of something called stercobilin, which is

More from the Human Body Facts niche...

Human Body Facts

Each of your eyes has a blind spot – where the optic nerve attaches to

Human Body Facts

Eye transplants are currently impossible due to the sensitivity of the

Human Body Facts

Blondes generally have more hairs on their head (145,000) than brunettes

Human Body Facts

You blink your eyes over 10,000,000 a year

Human Body Facts

Newborns don’t produce tears. They make crying sounds, but the tears

Human Body Facts

Just behind our pupil is the lens – which is round, flat and thicker