NASA will use the International Space Station as a stepping stone for the journey ahead. They will prepare astronauts for the human exploration. Explorers may visit near-Earth planets, we may get answers to the questions humans have always asked. Visiting an asteroid (小行星) will prepare for the first humans to step on Mars.
Robotic exploration continues to deliver answers about our Universe by visiting far-off destinations. When(combine) human and robotic exploration methods, we will use technology to increase our ability to observe and uncover new knowledge. Mars has always been source of inspiration for explorers. Robotic missions have found evidence of water, whether life exists beyond Earth still remains a mystery. So far, the evidence that Mars has characteristics similar to Earth's (show) by robotic missions. Humans can build upon this knowledge and look for signs of life on Mars, resulting in research and methods that could be applied here on Earth.
A mission to our nearest neighbor provides the best opportunity to show that humans can live beyond the Earth. The technology and space systems(require) to transport explorers will encourage creative ways to address challenges. The challenge of traveling to Mars and learning how to live there will encourage(nation) to work together to achieve such an ambitious undertaking. The International Space Station has shown that opportunities for cooperation will highlight our common interests and provide a(globe) sense of community.
