Lesson 3: The Final Conclusion

Key Idea

Absolute proof is rare in science, especially regarding distant planets. Instead, scientists strive for a preponderance of evidence. This means the bulk of the high-quality data leans heavily toward one conclusion over others.

When multiple lines of investigation—geological, chemical, and physical—all point in the same direction, scientific confidence grows. A conclusion reached this way is robust because it is supported by a diverse network of evidence, making it difficult to overturn without significant new data.

Key Idea

Science is a social endeavor. The final step of any investigation is scientific communication. Scientists must write and present their arguments clearly so that peers can review and critique their work.

Effective communication involves clearly stating the claim and methodically laying out the supporting evidence and reasoning. This transparency allows the scientific community to validate the findings, ensuring that the new knowledge becomes part of our collective understanding of the universe.