It was know to men from ancient times that there were pair of animals and humans. But If we Read Holy Quran its says in Surah Yaseen Verse 36. Glory to Allah, Who created in pairs all things that the earth produces, as well as their own (human) kind and (other) things of which they have no knowledge. Now, as the science advances , we came to know that not only humans and animals have pair but plant also have pairs and the same reproduction system.
In 1928,it was discovered that solid matter also had a pairs and when the study was pursed further its was discovered that all particulars in this world consist of pair-particles that is particle and anti-particle, atom and anti-atom, matter and anti-matter. As this world is made of of matter and according to law of opposite there must me some another world of antimatter as a pair of this world which accords with the teaching of Holy Quran.