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These spores were resilient enough to hatch even if the tree was converted into paper. The Tenth Doctor told Donna Noble that "Where there's meat, there's Vashta Nerada." ( TV: Silence in the Library) They were born as microscopic spores in trees and lived their lives in forests. ( AUDIO: Day of the Vashta Nerada)Įarth and "a billion other worlds", such as Funworld ( AUDIO: Night of the Vashta Nerada) and the Library, had Vashta Nerada living there. Vashta Nerada engineered on Synthesis Station possessed the ability to consume Dalekanium. A negative strain of Vashta Nerada that thrived in the light were also created, named Nerada Vashta. ( TV: Silence in the Library / Forest of the Dead) However, this unusual aggressiveness came from the fact that the books were printed with paper from the trees of the Vashta Nerada's forests and thus they saw the Library as their "forest". The Doctor stated that he'd never seen a swarm as large or as aggressive as the Library swarm.
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Existing on over a billion planets including Earth, the Vashta Nerada inspired a fear of the darkness but were nowhere near as aggressive as they were in the Library. ( TV: Silence in the Library)īesides the swarm in the Library, the Doctor indicated that the Vashta Nerada were generally harmless. ( TV: Silence in the Library / Forest of the Dead) The Doctor believed they had no weaknesses, and the only thing to do was to run. The Doctor could detect the difference between a Vashta Nerada swarm and an ordinary shadow by using his sonic screwdriver. If someone had an extra shadow, it was already too late.
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Light also slowed them down somewhat, but if the swarms were great enough, the effects of light would be minimised and overcome quickly. They mimicked the shadows of their prey to get close, which meant staying in the light was the only way to escape. On their own, outside of the darkness, a Vashta Nerada swarm looked like a shadow cast by nothing. They cast shadows when they entered the light - even stopping the reach of light from fission lamps. ( TV: Forest of the Dead) They also coordinated their efforts and made the spacesuits walk, though with some difficulty they walked slowly in a "zombie-like" fashion. ( AUDIO: Night of the Vashta Nerada) Vashta Nerada swarms were sentient and two spacesuit-inhabiting swarms developed the ability to communicate with the Doctor through the spacesuits' neural relays. ( TV: Silence in the Library) In extreme cases, they could tear apart the stone bodies of silicon-based lifeforms, though it was not necessarily edible to them. In large numbers, they could strip a creature to its bare bones in milliseconds. They were very small the Tenth Doctor claimed that some of the dust specks visible in bright sunlight were single Vashta Nerada or small swarms, not large enough to be a threat to most life. Individually or in small numbers, Vashta Nerada were not a threat. The Vashta Nerada were microscopic beings that lived in swarms, billions strong.