<P> The Ancients were able to hold the Wraith back with their superior weapons for a hundred years , until they were forced to submerge the city and to leave the Galaxy , for no matter how long they stalled the destruction of Atlantis , the Lanteans were unable to overcome the endless number of Wraith . They started to make more desperate experiments , such as Project Arcturus , a failed attempt to draw Zero Point Energy from their own universe , instead of from within an artificially created region of subspace as in Zero Point Modules . However , containing zero point energy in our own space - time caused serious containment issues , killing the Ancients and the people of Doranda , the planet it was based on . They also developed nanites designed to fight the Wraith on a cellular level , giving them aggression codes surpassing that of the Wraith . The nanites took human form , becoming a race known as the Asurans . They begged to have the aggressive nature removed from their programming , but the Ancients refused . Once it became clear the Asurans would never be the weapon the Ancients hoped for , they were subsequently exterminated by the Ancients . Not wanting anyone to find out their mistakes , the Ancients deleted all references to the Asurans in the Atlantis database , save for the gate address . A few of the nanites survived and brought up a second evolution , re-creating Asuran society . It is believed that at one point in time the Asurans even created several nano - viruses specifically designed to kill humans , so as to deprive the Wraith of a food supply . One such virus , which causes hallucinations and death caused by a brain aneurysm , was encountered in a lab on Atlantis . Janus , an Ancient scientist , also built a device called the Attero device , which emitted a specific frequency of subspace distortion , causing Wraith ships to explode when attempting to enter hyper - space . It was later shut off and ordered to be destroyed ( an order Janus , as usual of him , disregarded ) , because the same frequency which damaged the Wraith ships also caused an explosive overload in active Stargates . </P>
<P> The Ancients were able to hold the Wraith back with their superior weapons for a hundred years , until they were forced to submerge the city and to leave the Galaxy , for no matter how long they stalled the destruction of Atlantis , the Lanteans were unable to overcome the endless number of Wraith . They started to make more desperate experiments , such as Project Arcturus , a failed attempt to draw Zero Point Energy from their own universe , instead of from within an artificially created region of subspace as in Zero Point Modules . However , containing zero point energy in our own space - time caused serious containment issues , killing the Ancients and the people of Doranda , the planet it was based on . They also developed nanites designed to fight the Wraith on a cellular level , giving them aggression codes surpassing that of the Wraith . The nanites took human form , becoming a race known as the Asurans . They begged to have the aggressive nature removed from their programming , but the Ancients refused . Once it became clear the Asurans would never be the weapon the Ancients hoped for , they were subsequently exterminated by the Ancients . Not wanting anyone to find out their mistakes , the Ancients deleted all references to the Asurans in the Atlantis database , save for the gate address . A few of the nanites survived and brought up a second evolution , re-creating Asuran society . It is believed that at one point in time the Asurans even created several nano - viruses specifically designed to kill humans , so as to deprive the Wraith of a food supply . One such virus , which causes hallucinations and death caused by a brain aneurysm , was encountered in a lab on Atlantis . Janus , an Ancient scientist , also built a device called the Attero device , which emitted a specific frequency of subspace distortion , causing Wraith ships to explode when attempting to enter hyper - space . It was later shut off and ordered to be destroyed ( an order Janus , as usual of him , disregarded ) , because the same frequency which damaged the Wraith ships also caused an explosive overload in active Stargates . </P>
who made the nano virus in stargate atlantis
who made the nano virus in stargate atlantis
Asurans
Asurans