Vulcans are a fictional alien species from the Star Trek universe, known for their logical minds and lack of emotional expression. They originate from the planet Vulcan and have a rich cultural history that emphasizes reason and peace. Vulcans are characterized by their pointed ears and distinctive eyebrows, and they often practice a philosophy called Surak's teachings, which promotes logic over emotion. In the Star Trek series, one of the most famous Vulcans is Spock, who serves as a science officer aboard the starship USS Enterprise. Vulcans possess advanced technology and are skilled in various scientific fields, making them important allies in the interstellar community.