First kiss dates back 21 million years, say scientists

Victoria GillScience correspondent, BBC NewsGettyThe researchers found evidence of kissing in multiple species Humans do it, monkeys do it, even polar bears do it. And now researchers have reconstructed the evolutionary origins of kissing. Their study suggests that the mouth-on-mouth kiss evolved more than 21 million years ago, and was something that the common ancestor of humans and other great apes probably…