Radiometric dating is often used to “prove” rocks are millions of years old. Once you understand the basic science, however, you can see how wrong assumptions lead to incorrect dates. Most people think that radioactive dating has proven the earth is billions of years old. After all, textbooks, media, and museums glibly present ages of millions of years as fact. Yet few people know how radiometric dating works or bother to ask what assumptions drive the conclusions. So let’s take a closer look and see how reliable this dating method really is...