Mourning the loss of a loved one was initially thought to be just a human characteristic. However, over the years, experts have observed similar behavior in terrestrial social animals like gorillas and elephants. In one case, a herd of wild elephants spent hours trying to lift the body of their dead matriarch. After accepting her death, the elephants covered the body with leaves and tree branches and kept vigil for two days before finally dispersing. Now, scientists have discovered that even whales undergo tremendous sorrow when they lose an offspring or companion.