Portals are dimensional anomalies from Metroid Prime 2: Echoes. They are found on Aether and Dark Aether and act as gateways between the two dimensions. Most of them were created when a Leviathan struck the surface of Aether, creating its dark twin. Samus often uses them to travel from Aether to Dark Aether and vice versa while on her quest to save the Luminoth, making them extremely important.
The Portals were created when a Leviathan struck the surface of Aether and sent the planet into a state of Transdimensional Flux
. The division of Aether into two dimensions caused several spatial rifts between it and Dark Aether, through which the Ing began to travel, eventually leading to war
. This led the Luminoth to create machines to artificially generate Portals to take them to Dark Aether. read more...