What is meant by extinct how do scientists obtain information about extinct species?

Extinct refers to a species that no longer exists anywhere on Earth, meaning there are no living individuals left. Scientists obtain information about extinct species through various methods, including the study of fossils, which provide insights into their anatomy and behavior. They also analyze ancient DNA, compare extinct species to their living relatives, and use geological and ecological data to understand the environmental conditions in which these species lived. These approaches help reconstruct the history and characteristics of extinct organisms.