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{{first pic|Butterfly effect Space Babies.jpg|[[Ruby Sunday]] steps on [[butterfly (Space Babies)|a butterfly]]. ([[TV]]: {{cs|Space Babies (TV story)}})}} | |||
The '''butterfly effect''' was a theory that a [[butterfly]] could flap its [[wing]]s in one place and greatly affect events in another place. ([[PROSE]]: {{cs|Transit (novel)}}) This was a concern in [[time travel]] in that travelling to the past and making any little change, even something like crushing a butterfly, could drastically change the future. The [[Twelfth Doctor]] cited the "ripple effect", stating that if he'd change the past he could create a future where [[cat]]s ruled the [[universe]]. ([[TV]]: {{cs|Before the Flood (TV story)}}) | The '''butterfly effect''' was a theory that a [[butterfly]] could flap its [[wing]]s in one place and greatly affect events in another place. ([[PROSE]]: {{cs|Transit (novel)}}) This was a concern in [[time travel]] in that travelling to the past and making any little change, even something like crushing a butterfly, could drastically change the future. The [[Twelfth Doctor]] cited the "ripple effect", stating that if he'd change the past he could create a future where [[cat]]s ruled the [[universe]]. ([[TV]]: {{cs|Before the Flood (TV story)}}) | ||
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The [[Eighth Doctor]] confused the theory a few times, mentioning how a [[bat]] flaps its wings and causes a tropical storm ([[AUDIO]]: {{cs|Invaders from Mars (audio story)}}) and how the beat of a butterfly's wings in [[Mettula Orionsis]] caused a [[time storm]] in the [[Mutter's Spiral]]. ([[AUDIO]]: {{cs|Storm Warning (audio story)}}) | The [[Eighth Doctor]] confused the theory a few times, mentioning how a [[bat]] flaps its wings and causes a tropical storm ([[AUDIO]]: {{cs|Invaders from Mars (audio story)}}) and how the beat of a butterfly's wings in [[Mettula Orionsis]] caused a [[time storm]] in the [[Mutter's Spiral]]. ([[AUDIO]]: {{cs|Storm Warning (audio story)}}) | ||
A literal example of the butterfly effect was regularly caused by the [[Council of Eight]] when they tried to fill the void left by the [[Time Lord]] | A literal example of the butterfly effect was regularly caused by the [[Council of Eight]] when they tried to fill the void left by the [[Time Lord]]s after they were wiped out. The Council regularly dispatched their Time Agents through [[time corridor]]s to set moments in order to ensure predicted outcomes in history came to pass. In one case, a Time Agent released a butterfly in the atmosphere in a location in [[Africa]], which resulted in changes to the atmosphere which led to the sinking of the [[Spanish Armada]]. ([[PROSE]]: {{cs|Sometime Never... (novel)}}) | ||
[[Martha Jones]] recognised this theory from its appearances in Earth [[film]]s, and was concerned about whether or not it was safe to "move around and stuff" in her past, recalling that "You step on a butterfly, you change the future of the [[human]] race." The [[Tenth Doctor]] advised her "[not to] step on any butterflies", and asked her, "What have butterflies ever done to you?" ([[TV]]: {{cs|The Shakespeare Code (TV story)}}) | [[Martha Jones]] recognised this theory from its appearances in Earth [[film]]s, and was concerned about whether or not it was safe to "move around and stuff" in her past, recalling that "You step on a butterfly, you change the future of the [[human]] race." The [[Tenth Doctor]] advised her "[not to] step on any butterflies", and asked her, "What have butterflies ever done to you?" ([[TV]]: {{cs|The Shakespeare Code (TV story)}}) | ||
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When [[Bill Potts]] asked about the butterfly effect, the [[Twelfth Doctor]] teased her by inventing a friend of hers, "[[Pete (Thin Ice)|Pete]]", who had stepped on a butterfly and accidentally [[temporal erasure|erased himself from existence]]. ([[TV]]: {{cs|Thin Ice (TV story)}}) | When [[Bill Potts]] asked about the butterfly effect, the [[Twelfth Doctor]] teased her by inventing a friend of hers, "[[Pete (Thin Ice)|Pete]]", who had stepped on a butterfly and accidentally [[temporal erasure|erased himself from existence]]. ([[TV]]: {{cs|Thin Ice (TV story)}}) | ||
On her first trip in the TARDIS, [[Ruby Sunday]] was concerned about the butterfly effect, but the [[Fifteenth Doctor]] told her she had nothing to worry about. Ruby promptly stepped on a butterfly at the prehistoric site of [[Green River]], [[Wyoming]], and was replaced by an alternate timeline counterpart, [[Rubathon Blue]]. The [[Fifteenth Doctor]] negated Rubathon's timeline by reviving the butterfly, after which he turned on the [[butterfly compensation switch]] in the TARDIS. ([[TV]]: {{cs|Space Babies (TV story)}}) | |||
A [[chaotic limiter]] could be used to reduce or increase the butterfly effect, ([[PROSE]]: {{cs|The Book of the War (novel)}}) as could a [[butterfly compensation switch]]. ([[TV]]: {{cs|Space Babies (TV story)}}) | |||
[[Category:Causality]] | [[Category:Causality]] | ||
[[Category:Effects of time travel]] | [[Category:Effects of time travel]] | ||
[[Category:Temporal theory]] | [[Category:Temporal theory]] | ||