We explore the Hebrew word "nephesh" that often gets translated as "soul." The English word usually refers to a non-material essence of a human that survives after death, but nephesh means something different. It is referring to humans...

Howcast - Learn if thermage is an effective cellulite treatment from licensed esthetician Joanna Vargas in this Howcast video.

Howcast - Learn proper skating foot placement and stance from competitive skateboarder Nate Cohen in this Howcast skateboarding video.

What is string theory? When string theory is simplified - it can answer the question "Why do we exist?" First you must accept that there are two worlds we live in - the world of the large, the world we can see, which...

AdS/CFT suggests that our three-dimensional universe can be perfectly modeled by a two-dimensional surface. On one side is AdS, or Anti-de Sitter space, which is a kind of imaginary universe with some unusual properties...