Cats use their whiskers as a sensory tool to navigate their surroundings. The whiskers, also known as vibrissae, are highly sensitive and can detect changes in their environment such as the width of openings, movement of objects, and even changes in air currents. When a cat brushes its whiskers against an object or surface, the sensory information is sent to their brain, helping them understand the spatial layout and avoid potential obstacles. Whiskers also help cats gauge whether they can fit through tight spaces, making them excellent navigators in the dark or in unfamiliar territories.