Extinction and Fossils
Most species that have ever lived are now gone. Their disappearance, called extinction, and the fossils they left behind are two sides of the same story: how life on Earth has changed and sometimes vanished. This topic connects the history of life to the physical clues buried in rock. This lesson explains extinction and how […]
Evidence for Evolution
Evolution is not just an idea; it is supported by several independent lines of evidence that all point to the same conclusion. Knowing these categories of evidence, and one clear example of each, is exactly what science tests ask for, and it makes the whole topic feel solid rather than abstract. This lesson walks through […]
