Why something versus nothing?

Most physicists believe that during the Big Bang matter and antimatter were created in equal parts. However, when matter and antimatter meet, they destroy each other instantly and violently. And yet our world is made of matter, and all the antimatter seems to have disappeared. Why the universe didn’t just cancel itself out at the beginning has been an enduring mystery in physics ever since antimatter was first predicted in 1931. Scientists may now be able to study antimatter more closely, having captured antimatter atoms for the first time at CERN. This is a major breakthrough. As one CERN scientist stated, “This will help us understand the structure of space and time. For reasons that no one yet understands, nature ruled out antimatter… this inspires us to work that much harder to see if antimatter holds some secret.”