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Guy Raz
Grown ups Wondery subscribers can listen to wow in the World early and ad free right now. Join Wondery in the Wondery app or Wondery Kids plus on Apple Podcasts.
Mindy
Hey, Wowzer Fams. Mindy and Guy Raz here. And before we start the show, did you hear that? We are on YouTube.
Guy Raz
That's right, Mindy Wowzer fams. You can find full episodes of wow in the World and more of your favorite Tinkercast podcasts on our YouTube channel, WowTube.
Mindy
Plus on WowTube, you can also watch me explode some watermelons and test out Bonkerball's experiments in the laboratory of bad ideas.
Guy Raz
Or you can dance along with Dennis for music videos featuring music from WEW on the Weekend.
Mindy
There is so much in store made just for you on WowTube. Visit Tinkercast.com YouTube to watch. Now that's Tinkercast.com YouTube.
Dennis
We wow on the weekend. We wow on the weekend. We wow on the weekend. Cause this is what we do on the weekend. Talking, laughing, me and Reggie singing, laughing. And then we. Oh wait, no, I said laughing twice. Whatever. We wow on the weekend.
Mindy
Yeah.
Dennis
We wow on the weekend. Laugh, laugh. We wow on the weekend. Cause this is what we do on the weekend. Hello and welcome to Wee Wow on the Weekend. I'm your host, Dennis, and that's my co host, Reggie the Giant pigeon. Or Reggie for short or Reg for even shorter. Or just R for even shorter than that. Hey, Reggie, do you have a nickname for me? I think you should call me the Demon. No? Okay, how about the Denonator? Fine. How about Denster Dashing Dennis Denny Cakes Jr? Mr. Wham Jam. Mother's Little Gentle Boy Dennis the Darling Denny and the Jets. Well then, what do you want to call me? Ooh, just Dennis. Classic. Okay, let's get into the show. First up, we're going to do some cooking with a little segment I like to call Dishing it up with Mr. Wham Jam. Okay, fine. Dishing it up with Dennis. Ahah. Dish it up on a dish. Anything that you wish. Take a bite. That's delish. Dishing it up with Dennis and Reggie. So on previous Dishing it up with Dennis' we may have run into some issues with not having all the ingredients right. Or any of the ingredients. So this time we're making something super easy toast. Exactly. Not even I could mess this up. Okay, so I've got mother's old toaster from 1975 here, and I've got some bread. Just gonna put the bread into the toaster. Like this. And press down on the lever like this. And now we wait. Oh, sorry. I'll stop. Ahahaha. It's ready. And now, ladies and gentlemen, we have. Wait. Why didn't it toast? This bread is just still bread. What gives, Reggie? What do you mean it wasn't plugged in? Well, why didn't you say something? Okay, well, I'm plugging it in now. There we go. And we'll just push this back down. And let's move on to the next segment while that cooks. All right, next up is a little segment I like to call Inside Tinkercast Studios.
Guy Raz
Ahem. Ahem.
Dennis
Inside Tinkercast Studios. This is the part where we revisit an episode of one of my favorite Tinkercast shows. And today we're listening to wow in the World, Season 1, Episode 19 called Clean up youp Space. In this episode, Mindy and Guy fly into low Earth orbit to look at all the space junk floating around up there. Okay, fine. Reggie flies Mindy and Guy into low Earth orbit to look at all the space junk floating around up there, right? And then they talk about some of the biomimicry solutions scientists are working on to clean it up. Yeah, let's listen. Okay, here we go. And play.
Mindy
We wow. We'll be right back.
Dennis
Grown Ups.
Mindy
This message is for you. Hey, Grown Ups. Mindy here from wow in the World, the number one podcast for curious kids and their grownups. That's you. And we are so excited to bring the wows of the world to your home with our brand new wow in the World stem toys from Wondery Kids and Themes and Cosmos Channel your inner astronomer with our wow in the World telescope kit. Or zoom in on the tiny wows of nature with our wow in the World microscope and biology kit. You can even tinker like real scientists with our 100 experiments that wow Kit. And with every wow in the World stem toy, you unlock access to exclusive audio content from me and my buddy, Guy Raz. There are so many ways to wow. So whether you're shopping for a kid who loves science or one who doesn't just yet, our wow in the World stem toys are the perfect gift for your curious kids. Grown ups. Visit tinkercast.comtoys to shop the wow Now. That's it. Now back to the show.
Dennis
What in the world?
Mindy
Excuse me, is this thing on? I don't think it's on, Pickles.
Guy Raz
It's on.
Mindy
Oh, it is on. It's on. Oh. Can everyone hear? Can you hear me? Can everyone hear me? Thank you. Thank You.
Guy Raz
Thank you.
Mindy
Now, astronauts, please take your seats. Sit down. Please take your. Sit down. Sit down. All the way down.
Guy Raz
Okay.
Mindy
Okay. Then you can float if you need to. All right, just. I need everyone's attention. Okay. Thank you. Thank you. Now, you may all be wondering why I brought you here today to the International Space Station. Well, it's been brought to my attention that you have. You have been leaving your space junk all over outer space, and now it's time to clean it up. It's not even mine. No, I don't care whose junk it is. It's a mess up here and it's dangerous. And if we don't clean it up, someone is going to get hurt. Astronauts, I'm only going to say this once. Clean up your outer space right this minute, or no freeze drops. Ice cream for dessert.
Dennis
Come on.
Mindy
And I don't want to hear any whining.
Guy Raz
Hey, Mindy, who are you yelling at in here? I could hear you all the way from my house.
Mindy
Oh, hey, Guy Raz. I'm just imagining what I would say to the astronauts on the International Space Station if I had the chance. Wha. And it is not going well. Here, pop the top of my head and see for yourself.
Guy Raz
I still feel weird about doing this, Mindy. Ugh.
Mindy
Here, I'll do it for you. Just. Whoa. Quick, close it back up before they get out. See what I mean?
Guy Raz
Yeah. Wow, those astronauts are really mad. What's going on?
Mindy
I know. I just asked them to clean up all their scrap metal and junk that's floating around in space. It's a mess up there.
Guy Raz
You mean all those bits of old satellites and empty rocket parts and pieces of metal just floating around Earth?
Mindy
Yeah, it's just this giant junk jumble that's been grow since 1957, which, by the way, is the same year that humans first launched a rocket into space. And that was the rocket that carried the world's first space satellite called Sputnik. Still the best name ever.
Guy Raz
Oh, yeah, that was launched by Russia.
Mindy
You are a little baby Einstein, guy Raz. Anywho, ever since then, we humans have been launching more and more and more and more and more rockets and satellites up into space.
Guy Raz
Mindy, did you happen to investigate just how much junk is even up there?
Mindy
Sure did. So the last time I counted.
Guy Raz
You did not count it, Mindy.
Mindy
Okay, so the last time someone else counted NASA, they found more than 500,000 pieces of space junk all the size of a marble or larger, just orbiting or circling around the Earth.
Dennis
Wow.
Mindy
And now there are so many pieces of metal floating up there and orbiting around our planet that it's actually. Actually making things dangerous.
Guy Raz
Dangerous as in some of this junk can actually crash into other junk.
Mindy
Yep. And in fact, this junk is flying around so fast that it's pretty surprising that there aren't even more accidents and crashes.
Guy Raz
Yeah, I see your point. And I imagine that this can cause real problems for satellites like the ones we use to help forecast our weather, or the ones that take the pictures of Earth.
Mindy
Yeah, and it could also be dangerous for the human astronauts aboard the International Space Station.
Guy Raz
Yikes. And I'd imagine that crashes caused by the space junk would probably create even more space junk that would go on to destroy more objects in space. Like a. Like a chain reaction of junk and disaster.
Mindy
You know it, Guy Raz. In fact, there's even a name for this crazy catastrophic chain reaction.
Guy Raz
Really?
Mindy
Yep. It's known as the Kessler Syndrome. And it's named after the NASA scientist, Donald J. Kessler, who first came up with the idea all the way back in 1978.
Guy Raz
Hmm. The Kessler Syndrome. A catastrophic chain reaction of junk and disaster. That sounds like. Hey, that sounds like you, Mindy.
Mindy
What? I can't believe you noticed. Guy Raz. Hey, have you ever wondered what it might feel like to fly through all that space junk?
Guy Raz
Come to think of it, not really.
Mindy
Well, then you're in luck, my friend, because I have purchased not one, but two space debris proof rubber space flying suits. And I got one just your size. Then I lost it, so I had to go back to the store, and they only had toddler sizes left, so I had to get one of those for you. It's gonna be a tight squeeze, but it will be worth it.
Guy Raz
No.
Mindy
Here, put this on.
Guy Raz
Come on.
Mindy
You can do hard things. Just sucking everything you got. There you go, little buddy.
Guy Raz
This thing.
Mindy
Now just try not to exhale while I jump into my seat is a little tight. All set. Ready to go.
Guy Raz
You promise this is gonna protect us?
Mindy
No, I can't promise you that. But what's a few bumps and bruises, Guy Raz, when you are in the pursuit of science.
Guy Raz
Yeah, fair enough.
Mindy
Okay, so listen carefully, because here's how it's gonna work. So first, my carrier pigeon, Reggie, is going to fly us up to the upper reaches of the stratosphere. And then we're gonna have to use these rocket launchers on our rubber spacesuits to get us into low Earth orbit. Okay? Okay, Mindy, Reggie, slap on your space goggles, you cuckoo old bird. We're Ready for takeoff, Guy Raz, let's say the magic words.
Guy Raz
Here we go.
Mindy
Okay, now this is the part where Reggie says, sayonara. Flip on your rocket booster sky rods.
Guy Raz
Okay, I'm assuming it's this red button from here.
Mindy
Yep, that's the one. This is so awesome. Can you believe it? We're flying through space. Guy Raz.
Guy Raz
Mindy. Mindy, I. I think we're traveling at 17,000 miles an hour.
Mindy
That sounds about right. Whoa. Rocket, straight ahead. Roll the clock. Watch your hands.
Guy Raz
Just missed it.
Mindy
But. But.
Dennis
Wow, this is not.
Guy Raz
There's so much junk up here.
Mindy
I know, right? I told you. Whoa. Watch out. Here comes a bunch of blue screws.
Guy Raz
I think they're gonna hit us.
Mindy
Brace for impact.
Guy Raz
Mindy, I think I get the point. Can we rocket back to Earth now?
Mindy
Ah, sorry, I'm. I can't hear you, Guy Raz. I'm already halfway back to Earth.
Guy Raz
Oh, brother. Rocket booster's on. Back to Earth. What? Oh, no.
Mindy
Oh. Hey, Guy Raz. Where did you come from? Man, that was wild.
Guy Raz
You were right, Mindy. It's a veritable junkyard up there in space.
Mindy
So now do you see why I wanted to get the astronauts to help clean it up?
Guy Raz
Yeah, but it's gonna be virtually impossible for the astronauts to do it alone. I mean, they're gonna need some help.
Mindy
You better believe it, Guy Raz.
Guy Raz
So then why don't we just invent like, a. Like a giant space net for them?
Mindy
Well, scientists have actually thought of that, but it wouldn't work because it would be so hard to capture all of that junk and keep it from floating out of the net.
Guy Raz
And of course, I guess a vacuum cleaner wouldn't work because it needs the air pressure here on Earth to suck things in.
Mindy
Yep, and in space, there isn't enough air pressure to get the vacuum cleaner to suck stuff up.
Guy Raz
So what can we do? I mean, how can we solve this problem of space junk?
Mindy
Well, the good news, Guy Raz, is that some super inventive scientists and engineers are already on the case.
Guy Raz
Phew. That's a relief. So what's their solution?
Mindy
Oh, geckos.
Guy Raz
Geckos?
Mindy
Well, not whole geckos. Just their feet.
Guy Raz
Now, I did buy my car insurance from a gecko, but I'm not sure he'd survive in outer space.
Mindy
Wait, did you really buy your car insurance from a gecko?
Guy Raz
You were the one to recommend him to me. Am you? You said he'd give me a discount.
Mindy
I didn't think it would actually work anywho Back to the gecko feet.
Guy Raz
I'm with you. I think so.
Mindy
You know how when you chase a gecko up a wall or a sliding glass door?
Guy Raz
Uh, no, I've never tried that.
Mindy
Well, I've tried it, and let me tell you, it's not as easy as it looks.
Guy Raz
Okay.
Mindy
Scale up super smooth walls like nobody's beeswax. And then laugh at you as they hang upside down by the tips of their toes.
Guy Raz
Right. And they're able to do this because they have super special sticky toes. Right.
Mindy
Well, this is where it gets interesting. So if you were to look at the bottoms of their toes under a microscope, you'd notice that they're actually covered in teeny, tiny microscopic hairs. Called setting. Huh.
Guy Raz
Interesting. But how are hairy gecko toes gonna help clean up all that space junk in low Earth orbit?
Mindy
Well, the story begins with an engineering professor at Stanford University in California named Mark Kotkowski. And he came up with this crazy idea, which he published in the journal Science Robotics.
Guy Raz
What was the idea?
Mindy
The idea was that by using something called biomimic.
Guy Raz
Biomimicry. That means using animals and plants as the inspiration for new technology. For inventing cool new things.
Mindy
Exactly. So in this case, that animal would be the gecko.
Guy Raz
And the gecko's sticky feet.
Mindy
You're picking up what I'm putting down, guy Raz. So Professor Kotkoski and his team designed a robot that is actually a giant gripper.
Guy Raz
Like a big robot?
Mindy
Yeah, kind of. And the bottom of it is covered in thousands of tiny bristles to mimic or copy the settee hairs on the gecko's feet.
Guy Raz
Wow.
Mindy
And what's really crazy is that each tiny bristle is 10 times thinner than a human hair.
Guy Raz
But how do these tiny hairs on the gecko feet and the robot help to create a sticky effect?
Mindy
Well, on both the gecko and the robot, the hairs or bristles work together to create a stick special kind of sticky electric force.
Guy Raz
Wait a minute. Are you referring to the van der Waals force?
Mindy
I knew this would excite you.
Guy Raz
So there are atoms or teeny tiny little balls of material which, to be clear, we cannot see with our own eyes. And they're on the hairs of the robot hand and the gecko, and those atoms stick to the other atoms on the space junk.
Mindy
Phew. That is a complicated phenomenon. But when it works, it can create a really tight sticky bond between two things.
Guy Raz
Kind of like a friendship.
Mindy
Yeah, Just like you and me.
Guy Raz
I get it.
Mindy
Yeah. And the tiny bristles are put on little pads that are attached to the robot. So it's kind of like a little robot hand or foot that the astronauts can hold onto and control.
Guy Raz
Wow. And so that's how it's able to grab onto the space chunk.
Mindy
You got it. Just like a gecko can stick and unstick its feet to walk up a.
Guy Raz
Wall, and this way, the robot can grab the space trash, Move it, and then, I guess, let it go.
Mindy
Pretty cool, huh?
Guy Raz
Yeah, I'll say.
Mindy
And professor Kudkosky and his team are designing this robo to be able to stick to and capture the biggest and most dangerous space junk up there.
Guy Raz
But, I mean, how big and strong will these robots be? Because, I mean, space junk can be huge. Some space junk is the size of trucks just floating around up there. I mean, it's pretty heavy garbage.
Mindy
Well, that's the thing. Because there's so little gravity in space, really heavy things like broken satellites or spacecrafts or space minivans Aren't actually heavy at all. It's a little bit like when you float in water and you feel a lot lighter.
Guy Raz
Yeah. So the astronauts that you were scolding in your imagination actually might be able to clean up some of this junk.
Mindy
That's what I was trying to tell them. These astronauts would be able to take handheld robots with sticky pads and stick them to pieces of space trash, Move it, and then unstick it.
Guy Raz
Yeah, but where would they put it, Mindy? I mean, it's not like they're dumpsters floating around in space.
Mindy
Oh, this is crazy. So they would push the space trash back towards the earth, which means that as it came back flying towards the earth, the speed would create so much heat that the junk would naturally burn up before it even reached our planet.
Guy Raz
Wow.
Mindy
Or they could even take some of it and put it inside a special spaceship to be recycled.
Guy Raz
So by cleaning up this giant garbage pile floating around in space, we would actually be making space a little bit safer.
Mindy
Yep. And this same gecko foot inspired technology could also be used to help us regular humans here on earth.
Guy Raz
Really? How so?
Mindy
Well, some medical researchers Are thinking that maybe they could use it to create a special kind of tape that could be used in place of stitches or even a pair of gloves that could give a person the ability to climb. Like spider man.
Guy Raz
Wow. I will never look at geckos the same again, Mindy.
Mindy
Me neither, guy. Raz. I'll never look at any animal's superpowers the same way again.
Guy Raz
Hey, you know what? That reminds me. Speaking of all this biomimicry and Animal superpowers. Did you know that Velcro was inspired by the tiny hooks or burrs from bushes and plants that stick to our clothes?
Mindy
No way. Prickly plants are nature's Velcro. Well, can you guess why researchers are studying how schools of fish swim together without bumping into one another?
Guy Raz
Hmm. I wonder if that might have something to do with wanting to figure out how to do the same thing with cars. With driverless cars. You know, to keep them from crashing. Yep. And hey, have you heard of the Ultra cane?
Mindy
The edible peppermint candy walking cane that people can suck on when they're not using it to help them walk?
Guy Raz
What? No, no, no, no. It's a cane for the blind which uses echolocation, or sound waves to tell the person using it that they're close to an object like a wall. It's the same technique used by dolphins and bats.
Mindy
Man, it's so cool to think that biomimicry of the smallest creatures could solve some of the biggest problems in our universe.
Guy Raz
So, about those astronauts in your head who are trying to get out of cleaning up their space junk.
Mindy
Oh, yeah. So you want to break.
Guy Raz
I don't know if my insurance covers climbing into your imagination, Mindy.
Mindy
It does if you bring your gecko. Insurance salesman.
Guy Raz
Okay, here we go.
Mindy
Easy does it.
Guy Raz
Do I just climb inside?
Mindy
Take your shoes off first. You got it. You got it. Climb right inside.
Guy Raz
Yep, I'm in here now. Now what, Mindy?
Mindy
Okay, now take the podium and show em who's boss.
Guy Raz
Astronauts. Hello. You're gonna have to clean up your space job.
Mindy
I'm an adult steering a band aid. Now tell him the good news.
Guy Raz
But thanks to the common reptile known as the gecko, cleaning up outer space is about to get a lot more fun.
Mindy
Wow.
Dennis
That was so cool. I love that part where Mindy and Guy flew through outer space and they were all like, yeah. And then Guy was all like wa. And then Mindy was all like, look out.
Guy Raz
And then.
Dennis
Oh yeah, we just listened to it. Well, now what?
Mindy
Ah.
Dennis
What was that? Oh, right, the toast. Was it toasting this whole time? Oh, yeah, that is. That is burnt. Do you want to try it? Oh, come on, Reggie. It's not that burnt. I'm not going to eat it. It's completely charred. I mean, sure, I'll try it. Mmm. So yummy. Ah, blah, blah, blah. Yeah, I need a glass of water. Let's wrap up the show. Thanks to all you listeners out there for tuning in to Wee Wow on the weekend. If you have a question for me. Call and leave me a message at 1-888-7-WOW-WOW. That's 1-888-7-WWOW. I just might answer your question on Wee Wow on the weekend. Okay, let's go. The Goodbye song. Reggie, I need water. Everything tastes like charcoal. Okay, fine. That's the end of the show. I need to go and gargle a bunch of water and then maybe eat something sweet so my mouth doesn't taste like burning. But I'll do another show tomorrow. But for now, that's the end of the show. Ee bye.
Mindy
Grown ups. If you like wow in the world, you can listen early and ad free right now on Wondery.
Guy Raz
Join Wondery in the Wondery app or on Wondery Kids plus on Apple Podcasts. Prime members can listen ad free on Amazon Music.
Mindy
And before you go, tell us about yourself by filling out a short survey@wondery.com survey.
Hosts: Mindy Thomas, Guy Raz
Segment Host: Dennis
Special Appearance: Reggie the Giant Pigeon
Original Air Date: November 1, 2025
This WeWow on the Weekend episode of Wow in the World gives kids and their grown-ups a science-packed adventure full of curiosity, laughs, and imagination! Dennis and Reggie kick things off with a lighthearted cooking experiment, followed by a replay of a classic episode about "space junk" and innovative ways scientists are working to clean up Earth's messy orbit. Along the way, Mindy and Guy introduce scientific concepts like biomimicry and dig into how geckos could help solve space problems, while Dennis keeps things fun with his signature silly style.
Time: 01:23 – 04:10
Time: 04:10 – 22:37
Time: 06:13 – 10:13
Time: 10:45 – 14:09
Time: 14:10 – 20:19
Time: 20:24 – 21:23
Time: 22:39 – 24:37
The episode is lively, friendly, and jam-packed with energy, humor, and accessible explanations. Mindy and Guy’s interplay mixes education with imagination, and Dennis’ zany style keeps things light for kids and families.
This episode artfully weaves science, problem-solving, and wonder into an engaging story for kids and adults alike. By using space junk cleanup and biomimicry, the hosts show how clever ideas from nature can address big challenges, inspiring listeners to view the world—and the universe!—with curiosity and hope. After all, as Mindy says, “There are so many ways to wow!”