Scientific theories are explanations that scientists test many times to make sure they are reliable. They are not just guesses like how people use the word "theory" in everyday language. The Theory of Evolution is a good example of a scientific theory because it explains how life has changed over time using evidence from many areas of science. Scientists can change theories if they find new evidence to make them better.
Scientific laws describe uniform facts about nature and are considered irrefutable, while biology has fewer laws due to the complexity of living systems. Instead, biology relies more on scientific theories to explain natural phenomena.
