Imagine a little universe buzzing inside every tiny atom in your body. At the heart of this universe lies an atomic nucleus, which can sometimes change, a process we call 'Nuclear Decay'. It's like a popcorn kernel that has too much heat and pops, releasing energy. Nuclear decay happens when an atom's nucleus changes, releasing particles and energy. For example, a carbon-14 atom can decay into a nitrogen-14 atom, much like a caterpillar morphs into a butterfly. You might wonder why this matters to you. Well, nuclear decay is not just a fancy scientific term. It's a process that has a big impact on our world. It's the powerhouse behind nuclear energy, which lights up cities. It's also used in medicine to treat diseases and in archaeology to date ancient artifacts. So, the next time you're eating popcorn at a movie, remember the atomic theatrics happening inside every kernel... and inside you!