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Vulcans were the first aliens to make contact with humans (this event was depicted in the movie ''Star Trek: First Contact''), and most human-manned starships include one or more Vulcans in the crew.

Vulcans were the first aliens to make contact with humans (this event was depicted in the movie ''Star Trek: First Contact''), and most human-manned starships include one or more Vulcans in the crew.

They appear in all Star Trek series.

They appear in all Star Trek series.

Vulcans live a long time compared to humans, and have the ability to "mind meld", or temporarily join minds with another being.  Their greeting "live long and prosper", along with their manner of holding their hand up in greeting with the second and third fingers together and fourth and fifth fingers together forming a "V" shape has entered popular culture.

Vulcans live a long time compared to humans, and have the ability to "mind meld", or temporarily join minds with another being.  Their greeting "live long and prosper", along with their manner of holding their hand up in greeting with the second and third fingers together and fourth and fifth fingers together forming a "V" shape has entered popular culture. The salute was created by Leonard Nimoy (a neo-orthodox Jew) and is a single handed copy of the two handed gesture used when reciting the Aaronic blessing in Number 6.  The gesture is intented to signify the Hebrew letter shin, the first letter in "Shekhina" or the presence of God.  The verbal greeting "live long and prosper" is taken from the same passage.

== Klingon ==

== Klingon ==