http://www.sciconnect.com
"W E L C O M E to Science Connection, the meeting place for single science professionals and others with an interest in science or nature.
Why are we here? The world is a crowded Petri dish, and yet for those of an intellectual bent who happen to be single, it's not easy, especially past university age, to find that certain microbe for a great symbiotic relationship. Enter Science Connection.
What kinds of people are members? Most members are from the United States and Canada, with small numbers from elsewhere. We have members in the physical, natural, medical and social/behavioral sciences, technology, computers/IT, and various non-sci/tech occupations, including law, teaching, business, music, and the arts. There are about equal numbers of men and women, and the age range is 20s-80s. Many members are into natural history (birding, etc.) and outdoor activities."