Animals like dolphins or chimpanzees are such mysterious creatures that they have fascinated the scientists and the laymen for centuries. Dolphins are credited for their life-saving instincts and their playfulness particularly wins them the adoration from the old and young alike. Chimpanzees, though universally recognized as our distantly related cousins or ancestors, were not so popular for their aggressiveness and ferocity. What makes these creature high-ranking on the mammalian order is not only their mystic intelligence but their hard-wired social bonding skills. Dolphins live in groups just like the apes, but their communication means differ greatly, as one can tell that one is living deep in the ocean while the other is living on land. To uncover their secrets proves to be a daunting task. Nowadays scientists have found that their brain size is comparable to that of man, which may partially explain their superior intelligence. The genome of chimpanzee are over 94% identical to that of humans, an indisputable evidence that we are relatives. However lots of different voices were heard arguing against them being our relatives: the destructive and belligerent behavior was not common among humans. The puzzle was finally resolved after another team of scientists discovered the Bonob family, a group having an unusual amiable atmosphere and a predilection for cooperation and social bonding. Their painstaking work paid off. The understanding of these top creatures in the recent decades has far exceeded what we have unearthed for centuries.