Riya says humans have only five senses — sight, hearing, smell, taste, touch — that's it

Why

Riya's list of five is not wrong, exactly — those five really are senses — the mistake is treating that old, familiar list as the COMPLETE set, when it is actually just the ones with an obvious body part attached (eyes, ears, nose, tongue, skin), a classification dating back to the ancient Greek philosopher Aristotle. Modern science recognises several more real senses that do not have one single obvious organ: proprioception, the sense that tells your brain exactly where your arms and legs are without looking (it's how you can touch your nose with your eyes closed); the vestibular sense, based in the inner ear, that gives your sense of balance; and separate senses for temperature and for pain. Test it: close your eyes and touch your finger to your nose — you succeeded using proprioception, a genuine sense that is not sight, hearing, smell, taste, or touch, proving the five-sense list leaves something out. Her brother is right: humans have several more senses beyond the traditional five, including balance and body-position sense — the five-sense idea is a simplification that stuck, not a complete or fully accurate list.