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Brain scans show that grandmas connect with their grandkids better than their own children

Was your mom hard on you, but spoils her grandkids? There's an evolutionary reason behind it.

via PixaBay

A grandmother and grandchild share a special evolutionary bond.

It can be annoying, as a parent, when your own mom or dad who was super hard on you growing up, dotes and fawns all over their grandchildren. Something about becoming a grandparent turns even the hardest of souls into a big old softy. And, as rejected as it can sometimes make grown-ups feel, it turns out there might be a good reason for this phenomenon — especially in women. It's called the "grandmother effect."

For the past 55 years, scientists have theorized that a major reason why humans live so much longer past their reproductive years than other species is because of grandmothers. The "grandmother effect," as it's known, postulates that in hunter-gatherer societies, grandmothers played a vital role in finding food and raising children. In fact, the grandmother's role was so important that it had a huge impact on whether or not children survived.

 grandmas, evolution, grandma effect, grandmother effect, grandparents, parenting, family, love, kids, children Grandmas played a key role in the survival of early society families.  Photo by Tim Mossholder on Unsplash  

"By relieving a mother of some of her child-raising responsibilities, so the thinking goes, grandmothers make it easier for their daughters to have more children and also make it possible for those children to have longer lives by helping them during the difficult early years of life," Haider J. Warraich writes in Stat. Two studies further this hypothesis by showing the important roles that grandmothers have in the survival of their grandchildren. A study of birth and death records in Finland for individuals born between 1731 and 1890 found that having a maternal grandmother between the ages of 50 and 75 increased a child's survival rate.

Another study found that proximity to grandmother matters, too. The shorter the distance between grandmother and grandchild, the more involved the grandmother can be and the more benefits that accrue to her daughter and grandchildren.

In others words, grandmothers in early societies weren't just laying around like Charlie Bucket's grannies in Charlie and the Chocolate Factory. They were actively involved in lightening the childcare load, which benefitted just about everyone in the family.

The grandmother effect could be a major reason why a new study shows that grandmothers may feel a closer emotional bond to their grandchildren than their own offspring.

A study by James Rilling of Emory University in Atlanta, Georgia published in "The Royal Society" measured brain function in 50 grandmothers with at least one biological grandchild between 3 and 12 years old.

 grandmas, evolution, grandma effect, grandmother effect, grandparents, parenting, family, love, kids, children Give grandma a break if she can't stop loving on the kids.  Photo by 𝔥𝔦𝔩𝔩𝔞𝔯𝔶 𝔭𝔢𝔯𝔞𝔩𝔱𝔞 on Unsplash  

Grandmothers were shown photos of their grandchild, an unknown child, an unknown adult and the same-sex parent of the grandchild. The study found that when a grandmother saw a photo of their grandchild it activated parts of their brain associated with emotional empathy and movement.

When the grandmothers saw a photo of their adult child, it activated areas of the brain associated with cognitive empathy. So, to put it simply, when shown the pictures, the grandmothers were attempting to emotionally empathize with their grandchildren while trying to cognitively understand what their adult children were thinking.

That emotional empathy is extremely powerful and visceral. Cognitive empathy is useful, but is one layer removed. You can logically understand what someone is thinking or feeling without actually feeling it yourself. Emotional empathy is much more involved and tangible.

"That suggests that grandmothers are geared toward feeling what their grandchildren are feeling when they interact with them," Rilling said in an Emory news article. "If their grandchild is smiling, they're feeling the child's joy. And if their grandchild is crying, they're feeling the child's pain and distress."

Given the importance of the grandmother effect, it's no surprise that our grandmothers seem to be hardwired to love us in the deepest way possible. Science shows that without this incredible bond, humans may not have made it this far. Conversely, it also shows that without having such an important role in their post-reproductive years, our grandparents may not have evolved to live so long.

  - YouTube  www.youtube.com  

In the end, the relationship appears to be symbiotic. Grandmothers promote the survival of a child who one day may grow up to be a grandparent and live longer because they have such an important role in the life of their grandchild.

So if your mom was a tough cookie growing up but suddenly seems to be all sugar and gumdrops when the grandbabies are around, don't take it personally. It's embedded in her DNA to love and care for them. Without the responsibility of being the primary caregiver (who are usually just trying to survive the day to day), grandmothers are free to spoil, snuggle, and connect with their grandkids in a way sometimes they never could with their own children. It's a natural process, and ultimately a good thing. If you're lucky enough to have an involved grandma, the science says you should consider yourself lucky!

This article originally appeared four years ago. It has been updated.

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Modern Families

Study shows that grandmas may feel closer to their grandkids than their own children

There's an important reason for it.

via PixaBay

A grandmother and grandchild.

For the past 55 years, scientists have theorized that a major reason why humans live so much longer past their reproductive years than other species is because of grandmothers. The "grandmother effect," as it's known, postulates that in hunter-gatherer societies, grandmothers played a vital role in finding food and raising children. In fact, the grandmother's role was so important that it had a huge impact on whether or not children survived.

"By relieving a mother of some of her child-raising responsibilities, so the thinking goes, grandmothers make it easier for their daughters to have more children and also make it possible for those children to have longer lives by helping them during the difficult early years of life," Haider J. Warraich writes in Stat. Two studies further this hypothesis by showing the important roles that grandmothers have in the survival of their grandchildren. A study of birth and death records in Finland for individuals born between 1731 and 1890 found that having a maternal grandmother between the ages of 50 and 75 increased a child's survival rate.

Another study found that proximity to grandmother matters, too. The shorter the distance between grandmother and grandchild, the more involved the grandmother can be and the more benefits that accrue to her daughter and grandchildren.

The grandmother effect could be a major reason why a new study shows that grandmothers may feel a closer emotional bond to their grandchildren than their own offspring.

A study by James Rilling of Emory Universityin Atlanta, Georgia published in "The Royal Society" measured brain function in 50 grandmothers with at least one biological grandchild between 3 and 12 years old.

Grandmothers were shown photos of their grandchild, an unknown child, an unknown adult and the same-sex parent of the grandchild. The study found that when a grandmother saw a photo of their grandchild it activated parts of their brain associated with emotional empathy and movement.

When the grandmothers saw a photo of their adult child, it activated areas of the brain associated with cognitive empathy. So, to put it simply, when shown the pictures, the grandmothers were attempting to emotionally empathize with their grandchildren while trying to cognitively understand what their adult children were thinking.

"That suggests that grandmothers are geared toward feeling what their grandchildren are feeling when they interact with them," Rilling said in an Emory news article. "If their grandchild is smiling, they're feeling the child's joy. And if their grandchild is crying, they're feeling the child's pain and distress."

Given the importance of the grandmother effect, it's no surprise that our grandmothers seem to be hardwired to love us in the deepest way possible. Science shows that without this incredible bond, humans may not have made it this far. Conversely, it also shows that without having such an important role in their post-reproductive years, our grandparents may not have evolved to live so long.

In the end, the relationship appears to be symbiotic. Grandmothers promote the survival of a child who one day may grow up to be a grandparent and live longer because they have such an important role in the life of their grandchild.


This article originally appeared four years ago.

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Animals & Wildlife

Scientists just solved the chicken-and-egg debate, so what will we argue about now?

A billion-year-old discovery has officially cracked the ultimate evolutionary mystery.

Richard Symonds

This handsome gent just got some bad news.

In the ultimate mic-drop for chicken-or-egg debaters, Chromosphaera perkinsii, a billion-year-old unicellular organism, reveals that nature had "eggs" on the menu way before chickens (or any animals) arrived. But, though the mystery has been unscrambled, the discovery has cracked open an entirely new chapter in the story of life's origins.

Meet Chromosphaera perkinsii, a single-celled organism found in marine sediments off Hawaii that threw evolutionary biologists a curveball. This tiny protist, dating back more than a billion years, does something remarkable: it organizes itself into multicellular structures that look exactly like the earliest stages of animal embryos.

A sequence of images showing Chromosphaera perkinsii forming a colony. It looks like images you may have seen of early cell division, but this is of individual Chromosphaera perkinsii forming a colony. © UNIGE Omaya Dudin

Nature’s OG egg

Researchers from the University of Geneva (UNIGE), led by Omaya Dudin, have spent years studying this humble organism, and the findings are nothing short of stunning. Unlike most single-celled creatures, C. perkinsii can coordinate cell division without growing larger. Instead, it creates colonies that resemble the first steps of animal embryonic development.

"Although C. perkinsii is a unicellular species, this behaviour shows that multicellular coordination and differentiation processes are already present in the species, well before the first animals appeared on Earth."

— Omaya Dudin

Even more mind-blowing? When scientists analyzed the genetic activity within these colonies, they found it eerily similar to what happens in the embryos of modern animals. The processes that allow embryos to grow from a single cell into a multicellular organism—a hallmark of animal life—were apparently hanging out in the evolutionary toolbox long before animals even existed.

via GIPHY

A billion years of practice

The study, published in Nature, even raises the possibility that multicellularity evolved multiple times in different lineages, meaning the transition from single-celled life to complex organisms could be less linear (and more chaotic) than previously believed.

"It’s fascinating, a species discovered very recently allows us to go back in time more than a billion years."

— Marine Olivetta

The research could also reignite debates about mysterious 600-million-year-old fossils that look like embryos. Are they early animals or ancient organisms like C. perkinsii? Either way, this tiny protist suggests that nature was testing out egg-like developmental strategies long before anything resembling a chicken—or even a jellyfish—arrived on the scene.

The egg’s ultimate win

For anyone still clinging to the chicken in this debate, it’s time to throw in the towel. The egg wins by a landslide. And while these ancient “eggs” might not have shells or yolks, they set the stage for the evolutionary leaps that eventually gave us the breakfast staple we know today.

Still not convinced? Neil deGrasse Tyson shares the evolutionary approach to the puzzle. He bluntly points out that the egg came first; it was just laid by a bird that was not a chicken.

 @neildegrassetyson we've cracked the case over which came first, chicken or egg! 🐣 #scienceflex
♬ original sound - StarTalk 

Discoveries like this remind us how much we still don’t know about the origins of life. If a billion-year-old protist can hold the key to one of our oldest questions, imagine what else nature has waiting for us in its archives. But one thing’s certain: we finally have our answer. The egg was here first, and it’s been waiting for us to catch up for over a billion years.

So, with that settled, we are now tasked with finding something else to argue about. Science has yet to weigh in on the tree in the woods. Perhaps that puzzle will be the next to fall.

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Science

The reason why humans started kissing each other is kinda gross but really interesting

Let's just say love has evolved.

via Canva/Photos

A couple ready to smack lips.

There are few more beautiful moments in life than a romantic kiss. But there are a lot of other reasons why humans kiss, too. There’s the kiss that a parent gives a child to show them love. There’s the kiss that friends give each other on the cheek and the kiss of death from a mob boss, signaling that a member of the family is going to die.

Kisses play an essential role in the social lives of humans, but where did this behavior come from? Previous theories suggest it’s a holdover from the instinctual sucking that humans do as babies to get milk. Some researchers believe it’s behavior that evolved from when mothers would chew their baby's food before feeding it to them mouth-to-mouth.

Others have suggested that it’s a way for humans to sniff one another for “social” inspection. It’s a way of finding out where that person has been, who they've been with and what they've been eating.

Why do humans kiss?

A new research paper by Dr. Adriano R. Lameira, an Associate Professor and UK Research & Innovation Future Leaders Fellow at the Department of Psychology, University of Warwick, UK, argues that it comes from primate grooming rituals. “The most likely and straightforward evolutionary explanation is that mouth-to-mouth kissing evolved from an earlier form of kissing involving the mouth and other body parts,” he writes.

The disturbing part is that, according to Lameria, when we pucker up our lips and suck on someone else, it mimics a behavior we used to remove parasites from one another’s fur when we were apes.

Why do primates groom each other?

Grooming is a vital ritual in the world of primates. It consists of one ape picking through the fur of another and removing parasites, dead skin and debris. “Grooming helps to establish and maintain alliances, hierarchies, and group cohesion through social touch, with the consequent release of endorphins, which reduces stress and promotes feelings of well-being between groomer and groomed, further cementing social ties,” Lameria writes.



Whenever an ape finds something to remove from another’s skin, they usually eradicate it by sucking it off their body, in a behavior that works precisely like a kiss. The kiss-like motion is the last final stage of removing each piece of debris so that every grooming session ends with a final kiss. As apes evolved into humans, we lost most of our hair, so grooming sessions became shorter and shorter. “Presumably, up until the ultimate point when two individuals simply performed the last step of grooming, latching on their lips to the other's skin but having discarded the hygienic (and by now obsolete) function of grooming,” Lameira writes.



So, when we kiss each other, we're building and strengthening bonds with someone else, much like we once did through grooming rituals—only now, it's a quicker, more straightforward gesture.

As Sam, the piano player, sang in “Casablanca,” “You must remember this: a kiss is just a kiss,” but Lameira's paper shows that a kiss is much more than we could ever know. A kiss is a behavior that goes back millions of years, an example of the importance that social bonding plays among humans and other primates.

It’s interesting to learn where this behavior comes from. But, after reading this, it’s probably going to make kissing feel a bit more awkward when you consider that you are mimicking a behavior that was once used to remove bugs from your lover’s skin.

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