Have you noticed the phenomenon of puppy dog eyes, the inner eyebrow raising movement of dogs? Do you believe it    41    for dogs to appeal to humans? Researchers dissected dog and wolf heads and found that the facial muscle anatomy of both animals was almost identical --    42    an eyebrow muscle, found only in dogs. The inner eyebrow raising movement makes the dogs’ eyes appear larger and more infant like,   43   prompts a “nurturing” response in humans. When dogs make the movement, it seems to elicit a strong desire in humans to   44   them. This would give the dogs that moved their eyebrows more a selection advantage over others, reinforcing the trait in   45   generations. The findings show how important faces can be in capturing our attention, and how powerful facial expression can be in social interaction.

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       The ancient Greeks worshipped their deities by leaving offerings to them in temples, and honored them by holding regular festivals. Much is known about this worship because many of their temples, together with ritual objects and cult statues, have __41__ , and ancient Greek writers described religious rituals __42__ making offerings of food and wine. Worshippers hoped that the deities would look kindly on them __43__ return, since most gods and goddesses were said to take a keen interest in human affairs. In the mythical great war between Greece and Troy, for example, every stage of the conflict, together with the final outcome, was influenced as much by the actions of the deities __44__ by what the men of the two sides actually achieved on the battle field. The myths of Greece also show this __45__ between deities and humans in the guise of numerous heroes. Stories of heroes like Heracles and Jason, involving great adventures and journey as far as the Underworld, have been endlessly retold.