The Mother-Ark is the name that Earth Press gave to the huge, alien factory vessel responsible for the births of the Mmrnmhrm. It is sometimes referred to as the Factory-Ark or Mother Ark. After arriving in our region of space hundreds of years ago around circa 1200 CE, it produced millions of Mmrnmhrm robots and eventually broke down. This meant that the Mmrnmhrm, unless finding a new way to replicate or become hybrid (as they did with the Chenjesu), would eventually become extinct.