Kissing, one of humanity's most universal symbols of affection, has a surprisingly primal origin, according to a new study. Researchers suggest that kissing evolved from grooming behaviors in ...

To test their theory that mandrills were not grooming infected individuals to avoid getting parasites themselves, the researchers treated several with anti-parasite medication, orally and with IV ...

The author writes, “Killer whales have been observed grooming each other with a type of seaweed, the first known instance of a marine animal using tools in a way that was previously thought to be the ...

Dr. Lameira believes that kissing has everything to do with parasites and nothing to do with love, as he thinks it came to be through primitive grooming rituals.

However, the groomer would nevertheless close, or consummate, the grooming bout by approaching its protruded lips to the other's skin in order to latch on the parasite or debris," Lameira told ...

In their study, the scientists observed that the final act of grooming in our hairy ape ancestors involves protruding lips and slight suction to remove debris or parasites.

Well, this isn’t just the case for people, it is also an occurrence in the world of parasites – those lifeforms that live in and on us. ... (anti-parasite drugs) with minimal complications.