One of the male sexual organ’s main roles is to make procreation happen, but the penis also has cultural significance. Here ...

Test your smarts against this one-minute video, where Ask Smithsonian host Eric Schulze uncovers the facts behind five popular myths about the human body. 3play_processed Ask Smithsonian Explore ...

Read these 11 fun facts and you’ll know ... and the position of the cell body and the length and numbers of the axons and dendrites can vary. The human nervous system is defined as two parts.