Interdimensional portals

Evelyn, in an attempt to find a cure to the Maker mutation, searched other humans presenting a similar genetic built as hers. Simultaneously, MEDEA Research Labs were making progress on the artefact uncovered, the Reasoner, even going as far as creating interdimensional portal with it's powers. Thus why half of the 7Born come from another parallel dimension, the Alpha Dimension. Each of the Kids seems to be a younger version of already existing persons in the Beta Dimension.