Also placed on Nerva are enough plant and animal samples to help repopulate the planet, and a complete record of human knowledge. Several colony ships are also sent out from Earth, in hopes of populating the universe with human life. Some of these ships eventually encounter the insect species, the Wirrn, in the Andromeda galaxy. After a thousand year war, the Wirrn are beaten and left homeless, wandering the universe in search of food and breeding grounds. The Ark in Space.
Date is conjecture.
A few sheep survive the wreck, as well as a handful of spiders. These spiders find their way into the cave of the Blue Crystals, where the Crystals' power begins to mutate the spiders. Eventually, the spiders will mutate into powerful beings who will rule over the colonists for several hundred years. On Metebelis III, one the spiders which rule that world is sent to 20th century Earth in an attempt to retrieve the Blue Crystal in the Doctor's possession. Shortly after, one of the colonists, Arak, attacks one of the spiders' field guards, after the guard strikes Arak's mother, Neska.