Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth. A. Scientists had believed for centuries that meteorite activity influenced evolution on Earth. B. The site of the large meteorite impact at the end of the Cretaceous period was identified in 1990. C. There have also been large meteorite impacts on the surface of the Moon, leaving craters like Tycho. D. An iridium-enriched sediment layer and a large impact crater in the Yucatán provide evidence that a large meteorite struck Earth about 65 million years ago. E. Large meteorite impacts, such as one at the end of the Cretaceous period, can seriously affect climate, ecological niches, plants, and animals. F. Meteorite impacts can be advantageous for some species, which thrive, and disastrous for other species, which become extinct.