The document discusses some of the potential consequences of space travel and exploration. It notes that while space travel has many benefits like discovering new worlds and life, there are also significant costs involved both financially and potentially interacting with unknown alien lifeforms. The financial costs of programs like Apollo and shuttles are in the billions or hundreds of millions per launch. Some argue this money could be better spent elsewhere. There is also a risk that more advanced alien civilizations, if discovered, may see humans as a threat or resource to conquer.