A Re-Entry Vehicle (REV) is a spacecraft designed to return to Earth from space. It must withstand extreme heat and pressure during re-entry into the atmosphere. The vehicle's shape and materials are engineered to protect it from the intense conditions it faces, ensuring a safe landing. Re-entry vehicles are used in various missions, including those involving crewed spacecraft like the Space Shuttle and uncrewed missions such as space probes. They play a crucial role in space exploration, allowing scientists to bring back samples and data from other celestial bodies.