No matter how hard we try, remembering anything that happened to us before the age of, say, 3 or 4 years old feels impossible. Even memories before 7 years old feel hazy and fragmented.

Our brains just aren’t built to store specific memories from our first few years, something known as “infantile amnesia.”

And chances are, even the earliest memories we think we have might just be amalgamations of stories we’ve been told, images cribbed from old family snapshots and home videos, or scenes we’ve borrowed from movies or TV shows.

So does it really matter if it happened, if we can’t really remember it?

Yes, science says. Even if we don’t have a specific memory of what happened when we were babies, those experiences leave lasting impressions on us of being safe and being loved, which shapes how we form relationships later in life. But whether babies are able to encode and store permanent memories is still an open question.

Columbia University cognitive psychologist Tristan Yates put babies in MRI machines and showed them a series of images, and found that the babies tended to stare longer at an image they’d been shown before, suggesting that they remembered seeing the image the first time.

“We are showing that they’re able to form some memories,” Yates said. “The hippocampus is capable of forming specific memories over a few minutes, but now we need to start doing the research that can get us at longer durations, that can get at more complex memories.”

One theory for infantile amnesia is that an infant’s brain is prioritizing learning general skills, like how to walk or talk or eat, or learning to detect patterns like a bedtime routine, rather than storing specific memories that aren’t necessary for survival.

Noam Hassenfeld spoke with Yates and Dr. Dana Suskind, a professor of surgery and pediatrics at the University of Chicago, on the latest episode of Explain It to Me, Vox’s weekly call-in podcast.

Suskind studies early childhood development and the important role that parents and caregivers play, and she told Noam about how our early childhood experiences can shape us.

Below is an excerpt of their conversation, edited for length and clarity. You can listen to the full episode on Apple Podcasts, Spotify, or wherever you get your podcasts. If you’d like to submit a question, send an email to askvox@vox.com or call 1-800-618-8545.

You started out as a cochlear implant surgeon and now you’re working on childhood development. How did that happen? What’s the connection there?

It actually makes a whole lot of sense. When I first started our pediatric cochlear implant program at the University of Chicago, I started implanting cute little kids who all look like they had the same potential to thrive after implant surgery, and found very quickly that I could implant two children who looked very much the same, who had parents who loved them equally, with the same technology, but they would have very different outcomes, with one of them really thriving after surgery in terms of language learning and trajectories, and others barely able to communicate. 

It was that experience and seeing these huge differences in outcomes after the same surgery that led me into this incredible world of childhood development and the importance of the early years and the importance of parents.

Humans come out with brains that are literally only one-third the size of adult brains. That’s very different than any other species. It’s why the puppy can start feeding itself pretty quickly and start walking, whereas the human infant is helpless. In those first three years of life, 85 percent of the physical brain is built during those periods of time. 

A million new neural connections happen every second. The environmental input, the input from parents and caregivers — every serve and return, every touch, every gaze — literally is helping shape and strengthen the neural connections that happen in our brain. 

The brain isn’t being just built for your child’s vocabulary development or their literacy ability. It’s building their social brain, their ability to relate to and connect to the rest of the world. The relationships and the expectations for relationships are built in those early years.

Tell me if this is maybe an oversimplification, but I’m a parent of a young son; he’s a little over 7 months old. And I feel like what I’m doing when I’m raising him is building the structure of his brain, or building the architecture, and all the other stuff, all the specific things, are going to fill in all the rooms of the big building that we’re constructing together. But he’s not going to start filling those in with specific ideas or specific memories until later on in his development. 

The analogy you make is exactly right. I think of building the physical brain — if you were thinking about it through a computer lens — as building the hardware, the firmware, the memory, the RAM. I think of K-12 as really important, but I think of those as software updates. But these early years are building that infrastructure.

“I want you to not strive for perfection, because the one thing that AI has shown us is that humans don’t grow from perfection and frictionless existence.”

At the end of the day, it’s your attachment with him, being the perfectly imperfect parent. I want you to not strive for perfection, because the one thing that AI has shown us is that humans don’t grow from perfection and frictionless existence. So feel okay every time you misstep, misunderstand and repair, because that is, for him, building the understanding of, “I can be loved by another human who missteps but is able to repair.” He is starting to understand how to expect to be treated. 

That’s why it’s almost like you’re building the relationship map for him that’s going to allow him in the future to have expectations of how he’s going to be treated and loved by an imperfect human: building that strong bond, showering him with rich language, that back and forth, looking at him as a conversational partner from day one. 

It’s interesting you brought up AI and friction. What do you think this idea of a more frictionless existence is going to start meaning for kids?

I had a book that just came out on this called Human Raised, and that’s a lot of the argument of the book. Children learn from imperfect parenting through friction, through the productive struggle. And we’re seeing that friction that we’ve always looked at as a bug in the system — like, “Oh my gosh, I wish this was a more frictionless existence with the other humans in our world” — what we’re finding is that it is key for relationships development, learning to have relationships, and actually even learning. 

That’s why, writing an essay with an LLM — you don’t remember it at the end of the day. There’s something about what happens in the brain that we’ve discounted on the friction side of things. So I actually think in some ways friction should be the word of the year, and we need to embrace it a little bit more. We don’t need to friction-max, but we do need to see the power of the friction.

It sounds like even if my son is going to forget all of this, maybe on a deep level it’ll stick with him. But should I still have a nice big 1-year-old birthday party?

Heck yes. Because you’re doing it partially for you — and the grandparents, let’s be clear. Those are wonderful moments that they do remember at some level. My son, who’s now 20-something in medical school, was obsessed with Thomas the choo-choo train. I still have the box of the Thomas the choo-choo train. 

He may not remember exactly that birthday party and the cake that I worked very hard on, but it’s even fun to talk about it now in his twenties. So yes, do enjoy every moment. Don’t get obsessed, like everything has to be perfect, but those are memories for everyone.

I have to be honest about something that is a great source of personal shame: I am really, really bad at taking time off of work.

Despite working at a company with unlimited PTO, the last time I took a weeklong vacation was about a year ago, making me a walking cliche of the American who never goes on holiday. You could argue that the reason is cultural, that the Protestant work ethic has me in a chokehold. But I think the root cause is much simpler: For something allegedly relaxing and fun, vacations require a lot of planning and even more money. The price of flights is up, hotel rooms aren’t cheap, you need to factor in the cost of meals, and even that corny souvenir shot glass isn’t going to pay for itself. 

Hannah Sampson, who writes about travel for the Washington Post, says one answer is to take a staycation. “It’s taking the time to do things you normally wouldn’t do in your regular life and put on hold all of the burdensome things that you would do in your daily life,” she told Vox. “You’re enabling yourself to discover something that you might have taken for granted.” 

Plus, she says, a staycation can be “really fun and rewarding while also being budget-friendly and hopefully allowing you to put money aside for the bigger trip that you want to take sometime.”

So how do you make the most of a staycation? And how do you keep your typical day-to-day life from creeping in? We discuss that and more on the latest episode of Explain It to Me, Vox’s weekly call-in podcast.

Below is an excerpt of my conversation with Sampson, edited for length and clarity. You can listen to the full episode on Apple Podcasts, Spotify, or wherever you get your podcasts. If you’d like to submit a question, send an email to askvox@vox.com or call 1-800-618-8545.

It sounds like the key to a successful staycation is all about mindset. How do you achieve that mindset shift?

The way to really get into the staycation zone is planning and preparing and getting yourself hyped for what you’re going to do. This is something that I love about going on vacation and it applies to staying home too. 

Read reviews for places that you might want to go. If you’ve picked a restaurant, look at the menu and start to drool over what you’re going to eat. Think about your favorite bookstores or paths or discover a new corner of your neighborhood that you want to explore in advance. The anticipation of that experience will give you that vacation high. 

It’s so hard though, because you’re around the house. How do you make your home feel a little more special?

I think we all got too much practice on this during the pandemic, but there are a lot of things you can do to change the vibes of your house. I have a candle that’s national park-scented, so it’s piney. In my house, we do a lot of things like use audio to set the mood. I have small kids, so we’ll play audio of a ride at Disney World or just ambient sound from a park that we like. 

During the pandemic, my husband and I meant to spend our anniversary at the beach where we got married, but I was pregnant. We couldn’t travel. So we found a webcam that showed the sunset on that beach and we got takeout. It was really sad, but we watched the sunset.

It’s sad, but it’s also quite sweet. It’s like, “We’ll bring the beach to us.”

Exactly. And it was a beautiful sunset.

For me, one of the challenges of a staycation — and for all vacations, if I’m honest — is not letting real life creep in. And that’s beyond taking time to do administrative tasks around the house. That Slack goes off. I get that email. A news alert goes out and I’m just like, “Well, what if I just take a little gander?” How do you keep from letting that happen?

Unplugging is so hard. You could have a couple of small kids and teach them to tell you to get off your phone, which mine have learned to do. My husband actually has a Brick device, which locks your phone for you. The discipline is real there. 

It takes work to force yourself out of that constant need of scrolling through TikTok or just seeing what’s up at work. You don’t need to be on there. If there’s an emergency, they know how to reach you at work. So trust that process. Be super in the moment with whatever you’re doing because you need that mental break, even if you haven’t gone somewhere. 

You need to make the most of the time that you have, especially if you’re taking vacation time and spending it at home. Vacation time is a precious resource that you should be using to the best of your ability.