The tradition of sending paper valentines is traced to a young woman in the mid-1800s who decided to make them her business. ->
Trace explores good Samaritanisms in one of today's DNews Channel video.
A giant heart in New York City responds to your touch.
Several online dating sites, including eHarmony, claim a scientific approach to making matches. But where's the science?
Scientists' strange sexual tendencies, the dark history of Valentine's Day and mysterious sounds. Time for This Week in Discovery News!