The space shuttle is more different than any vehicle because it is both a spacecraft and an aircraft. It is the only vehicle that can launch into orbit and then re-enter the Earth's atmosphere and land on a runway. The space shuttle is also the only vehicle that can carry astronauts and cargo to the International Space Station.

Here are some of the specific features that make the space shuttle unique:

* Its dual nature: The space shuttle is both a spacecraft and an aircraft. It has the wings and engines of an aircraft, but it also has the heat shield and other features of a spacecraft. This allows it to launch into orbit and then return to Earth.

* Its size: The space shuttle is the largest spacecraft ever built. It is over 122 feet long and has a wingspan of over 78 feet. It can carry up to seven astronauts and over 50,000 pounds of cargo.

* Its reusability: The space shuttle is the only reusable spacecraft. This means that it can be used multiple times, which saves money and allows NASA to launch more missions.

* Its complexity: The space shuttle is one of the most complex machines ever built. It has over 2.5 million parts and requires a team of hundreds of engineers and technicians to operate.

The space shuttle is a remarkable achievement of engineering and a testament to human ingenuity. It has revolutionized space exploration and has made it possible for humans to live and work in space.