Years of research by scientists shows that elephants feel emotions such as joy, anger, grief, altruism, compassion, stress, and love. It has even been said that the emotional attachment elephants experience towards family members may even be comparable to that of human beings. This research suggests that these large land mammals do not solely focus on survival. They also act on feeling.
The liver is the only human internal organ capable of natural regeneration of lost tissue; as little as 25% of a liver can regenerate into a whole liver. Regeneration is very rapid. The liver will return to a normal size in one to two weeks following the removal of greater than 50% of the liver by mass.