Einstein's greatest contribution to mankind is the theory of relativity, which is a powerful tool for mankind to study the universe. Einstein used the theory of relativity to calculate the mass of the universe and found that the total mass of the universe turned out to be zero. Einstein believed that, The matter produced in the universe after the Big Bang has two forms, antimatter and positive matter are completely opposite, and the masses of positive and antimatter are equal. However, scientists have only found a small amount of antimatter in the universe
Einstein's calculations through the theory of relativity are correct.
where did most of the antimatter go? If they do not exist in the universe, Einstein will not find that the total mass of the universe is zero through the calculations of the theory of relativity. But the mass of the universe is zero, which shows that antimatter should still exist in the universe.