Evidence shows that our planet started off very simple and small and as time progressed, changes were starting to arise. Research shows many ways to support the theory of evolution. Amongst those reasons are fossil records, embryology, and comparative anatomy. Fossil records are one of the pieces of evidence that support evolution. Fossils are the remains of a prehistoric organisms preserved in petrified form, as a mold, or cast in a rock. Fossils can also leave traces of organisms such as leaves, insects preserved in amber, footprints, etc. Another example of fossils are dinosaur bones, there was a study on dinosaur extinction where a meteorite struck earth and there were the remains of dinosaur bones. To this day, scientists continue to find dinosaur bones in many part of the world. Fossil records can help scientists gather information about the lives of organisms from the past. Another piece of evidence that can support natural selection is comparative anatomy, which is the study of similar and the difference between living things. Homologous structures are structures similar in structure, but are different in function. For example, a human hand and bat wings, they both carry the humerus, Ulna, radius, carpals, metacarpals, and phalanges. But, they do different functions, for the human hand they pick up and hold objects, and for the bat wings, they use it for flying which get them to different locations. Comparative anatomy can help scientists because they can determine that all living things are related and they come from a common ancestor.The final piece of evidence is embryology and development. Embryology is the study of how creations develop before being born or hatched from eggs. For example, let’s talks about dolphin’s development stages. It starts off as a early fetus where the dolphin has two early nostrils, as time goes on the dolphins nostrils will eventually end up at the end of the head. Scientists can use embryos as evidence to support evolution because they realize that a lot of organisms share the same common origin. Another thing they found was a vestigial structure which is basically structures that have no purpose. There is a theory where features of ancestors that no longer have a function for that specie will become smaller until it disappears. In conclusion, evidence that researchers have gathered can help them identify what happened in natural selection. We can use these lines of evidence such as fossils, embryos, and comparative anatomy to help us get a better understanding on how species were able to appear on Earth.