Scientific Theories

Scientific Theories

A scientific theory explains natural events using facts, experiments, and observations. Scientific theories are not just guesses but well-tested explanations supported by strong evidence. Two well-known theories in the life sciences are cell theory, which states that all living things are made up of cel...

Did you know that tiny, invisible organisms are behind many diseases like the flu or stomach pain? Many years ago, this concept seemed revolutionary, but science revealed the truth through hypotheses, laws, and theories, each playing a vital role.

It begins with a hypothesis—a testable idea that predicts patterns. For example, a doctor mi...