Only two kinds of egg-laying mammals are left on the planet today—the duck-billed platypus and the echidna, or spiny anteater. These odd “monotremes” once dominated Australia, until their pouch-bearing cousins, the marsupials, invaded the land down under 71 million to 54 million years ago and swept them away.
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.