If you clench your hand into a fist, this is approximately the same size as your heart. It is located in the middle of the chest and slightly towards the left. The heart is a large muscular pump ...

One halcyon spring day in 1903, the 69-year-old anatomist and naturalist Dr. James Bell Pettigrew sat at the top of a sloping street on the outskirts of ...

This large, jelly-filled cavity in the center of the snout is thought to be an electrosensory device for detecting weak electrical impulses given off by prey. Evidence for this function first came ...