(a)It is believed that meteorite activity influences the evolution on Earth
(b)The site of a 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
(d)Large meteorite impacts, such as one at the end of the Cretaceous period, can seriously affect climate, ecological niches, plants and animals