Male gentoo penguins present tiny pebbles to the females to show affection. With Valentine’s Day upon us, it’s the perfect time to check in on how the animal kingdom is gearing up for the most ...

Kissing feels so tied to human life that it can seem almost impossible to separate from romance, family, grief, ritual, or desire. It sits inside wedding vows and movie endings, in greetings, ...

Add Yahoo as a preferred source to see more of our stories on Google. Humans are not the only animals that kiss. Apes, prairie dogs, birds, wolves, and dogs use similar behavior for bonding. (CREDIT: ...