Comprehensive guide to geologic time - Earth's 4.54-billion-year history. Learn how scientists measure deep time, understand the geologic time scale, and discover practical applications in energy, climate science, and engineering.
Discover how scientists proved Earth is 4.54 billion years old using radiometric dating of rocks and meteorites. Explore key methods like Uranium-Lead dating, the geologic timeline, and why Earth's age matters for evolution and climate change.