One evidence of the giant impact theory is the similarity in isotopic compositions of certain elements found in both the Earth and Moon. Isotopes are different forms of an element with varying numbers of neutrons in their atomic nuclei. By analyzing the isotopic ratios of elements like oxygen, titanium, and tungsten, scientists have found that they are remarkably similar in both Earth and Moon samples. This suggests that these elements have a common origin, supporting the hypothesis that the Earth and Moon were once in the same location.
