Antimatter is key in Big Bang theories because the early universe produced nearly equal amounts of matter and antimatter, but a slight imbalance led to matter dominating and forming the universe we see today.

Antimatter is central to Big Bang theories because the early universe created nearly equal amounts of matter and antimatter, but a slight imbalance caused matter to dominate, leading to the formation of the universe as we know it.

Antimatter plays a crucial role in Big Bang theories as scientists believe equal amounts of matter and antimatter were created at the universe's birth, but a mysterious imbalance caused matter to dominate, leading to the universe we see today.