The best addition to the rebuttal will ultimately depend on the specific context and the main points being addressed. However, here are a few potential options:
1. "Furthermore, the economic benefits of space exploration cannot be overlooked. Studies have shown that every dollar invested in NASA generates a return on investment of up to $10 in economic growth, job creation, and technological innovation."
2. "Moreover, space exploration has consistently proven to be a catalyst for international collaboration and peace, as countries come together to achieve common goals and push the boundaries of human knowledge and achievement."
3. "In addition, the advancements made in space technology have direct applications on Earth, ranging from weather forecasting and communications to improving medical devices and addressing environmental challenges."
Consider which addition aligns best with your argument and provides the most compelling evidence to support your viewpoint.