Spiders have small brain size could fill the entire cavity of their bodies, and spreads to the legs.
We could not exist without the five human senses. Sight, hearing, touch, smell, and taste are our lifelines. Without them, our bodies wouldn’t be capable of survival. Scientists still don’t understand everything about the human senses and it’s bound to be a fascinating study for scientists for many years to come. What is known now cannot begin to explain the complexity of what happens in the brain when a human experiences sensations.