The Mind Meld
The Vulcan brain is “a puzzle wrapped in an enigma, housed inside a cranium.” And other than the Trill, Vulcans are the only other humanoid in the Star Trek universe that can transfer an individual’s consciousness into another’s. It’s called the “mind meld.”
Source: CBS
Vulcans have lots of abilities, like how their inner eyelids protect their eyes from the intensity of their sun. They can also survive for days without water, which is probably because they evolved on a hot, dry planet.