[RADIOLAB INTRO]

LULU MILLER: Happy new year! This past year, we lost a great one. Alice Wong, the renowned disability activist, MacArthur Award winner and writer and podcaster and so many other things, including, we all feel lucky to say, friend of Radiolab. You may remember her from an episode we did in the fall called "Voice." Alice brought us a very rad and real piece about how losing her speaking voice changed how she responded to the world and how the world responded to her.

[ARCHIVE CLIP, Alice Wong: I have observed people do talk over me, because I guess they don't recognize the sounds I am making as a voice. And as you can guess, I seethe and silently plan their destruction.]

[ARCHIVE CLIP, Lulu: [laughs]]

LULU: And so to kick off the new year, we all wanted to pay some small tribute to Alice. And as we were trying to figure out how to do that, I went back and listened to the last conversation we ever had, which was just two months before she died. And I felt guided by this one tiny moment.

ALICE WONG: To celebrate the recovery from my bed rest, I saw Lady Gaga in the summer when she was in San Francisco.

LULU: [laughs] Oh, awesome. What was that like?

ALICE WONG: Oh, the energy and vibe was amazing. I dressed as Ziggy Stardust with full makeup and a sparkly pink shirt and silver pants and boots. I was really feeling myself, and am pursuing pleasure as much as I can while I can.

LULU: Alice was so serious about what she was doing. She went to bat for disabled folks. She called out ableism. She did not mince words. But she was also so full of joy.

ALICE WONG: In fact, I am seeing Stevie Nicks in October, and my witchy powers will be in full display.

LULU: My text chain with her is full of really bad puns, memes of her mocking my children. And F bombs. So many F bombs. Woman cursed like a sailor. And one thing that her Ziggy Stardust comment made me realize that maybe not everyone knew about her is that she was really passionately into space. In a fake obituary that she wrote for herself, she said that she lived to the age of 96 and spent the last few decades of her life living on the moon. She said she lived in a zero gravity capsule as a member of, quote, "Crips in Space," a group of scientists, creators and explorers.

LULU: Now when I look up at the moon, I picture Alice is up there in lower gravity, experiencing less pain. In that same obituary, she also imagined that we all organized a quote, "multidimensional interstellar memorial on her behalf." So as I wait for aliens to get back to me regarding logistical details, I figured as a little start, we could play an episode about this place she dreamed of living, the moon. Funnily enough, it is also a story that ends up being about access, and about how the moon itself is more accessible to most of us here on Earth than we realize. It is an episode of Terrestrials. Alice was actually an advisor of Terrestrials. She was always rooting for weird work, and helped us make pieces that treated disability with care. So here we go. Thank you, Alice. We miss you. Please accept this humble lunar offering as a small token of our immense gratitude.

LULU: Three, two, one!

NATALIE MIDDLETON: Imagine that you're teeny, teeny tiny, and you have this hard shell. But inside that shell is everything you need to start growing to 200 feet tall.

LULU: [gasps]

LULU: And you are all set to be an earthling, until somebody launches you, hurls you toward the moon.

NATALIE: And you travel 250,000 miles, the farthest that any living thing has ever been. You see the far side of the moon, where all there is is stars.

LULU: And then you start falling back, back, back towards the Earth at faster speeds where nobody is sure if you'll survive. But when you hit the soil ...

NATALIE: You feel the warm sun, and you unfurl from your shell.

LULU: You have become ...

NATALIE: A moon tree.

LULU: A moon tree?

NATALIE: Yes.

LULU: All right. Now is the part where I make you sing the theme song with me.

LULU: [singing] "Terrestrials. Terrestrials. We are not the worst we are the ...

NATALIE: "Bestrials."

LULU: Yes, you got it!

LULU: Terrestrials is a show where we uncover the strangeness waiting right here on planet Earth. I am your host Lulu Miller, joined as always by my Songbud ...

ALAN GOFFINSKI: [singing] I do believe ...

LULU: Alan.

ALAN: [singing] ... we took those trees to the moon!

LULU: And today we are joined by one of our favorite storytellers, one of the people who fact checks our Terrestrials episodes to make sure everything we're saying is true.

LULU: Can you please introduce yourself?

NATALIE: Hello, I'm Natalie Middleton.

LULU: So it's funny that you are the person on our team who kind of certifies truth, because you are bringing us a story that sounds like science fiction, like sci-fi!

NATALIE: Yeah [laughs]

LULU: Where do we start?

NATALIE: This whole story begins all thanks to a firefighter called Stu "Smokey" Roosa.

LULU: Oooh, Smokey's his middle name?

NATALIE: That's his nickname, yeah.

LULU: Or nickname. Smokey. Okay, Smokey the Firefighter.

NATALIE: Originally born in Colorado in 1933. Redhead, freckles, tall, kind of lanky. Prankster. He's whip smart, really good at math. And he absolutely loved trees.

LULU: And after high school, he got a job with the forest service trying to fight this fungus called blister rust.

NATALIE: Which is a fungus that is really hard for trees to survive.

LULU: So you're saying he loved them so much his actual job was to protect them from getting sick?

NATALIE: Yeah. And so every summer after that, he would go and fight fires. What he became is called a "smoke jumper."

LULU: A smoke jumper? That sounds a little scary.

NATALIE: It's pretty dangerous. So they're jumping out of planes with a parachute, basically into the fire.

LULU: Wow! Are they wearing, like, fireman gear? Like the jacket and ...?

NATALIE: It's actually kind of similar to, like, an astronaut suit.

LULU: Hmm!

LULU: And at some point as he's floating through space, he wonders what it would be like to float through space. Higher space. Outer space. So first, he learns how to fly a plane.

NATALIE: Yes.

LULU: Then he trains and becomes an astronaut.

NATALIE: He just kind of went up higher in the sky. [laughs]

LULU: [laughs]

LULU: And one day, NASA tells him he's going to the moon.

NATALIE: Apollo 14.

LULU: And his job?

NATALIE: He's going to be the pilot.

LULU: Whoa! He's flying the spaceship?

NATALIE: Yes.

LULU: Wow! Go Smokey!

NATALIE: It's a big job.

LULU: So the year is 1971. The spacecraft is all loaded up with gear and fuel. And each astronaut gets to bring with them one little bag.

NATALIE: It's not big. It's, like, almost like a pocket size.

LULU: It's made of a special type of glass.

NATALIE: That won't melt until it's hotter than over a thousand degrees Fahrenheit.

LULU: Whoa, that's like a furnace!

NATALIE: Very fireproof.

LULU: And what can they put in there? Is it like their license and toothbrush?

NATALIE: Yeah, so astronauts actually just get to bring whatever is meaningful to them.

LULU: Aww! What would you bring?

NATALIE: Oh! [laughs] So I have a daughter that's two. She drew a train. And yeah, I would probably bring that.

LULU: Hmm. What did Smokey bring?

NATALIE: So out of everything that he could have thought to take on Earth, he chose to take tree seeds.

LULU: Back to his love of trees. He can't shake it!

NATALIE: [laughs] Yeah.

LULU: He brought a big handful of five types of seeds.

NATALIE: Sweetgum.

LULU: Leafy trees from the east coast of the US.

NATALIE: Loblolly pine. They're from the South.

LULU: Loblolly, loblolly, loblolly. That's fun to say.

NATALIE: We have the redwood tree.

LULU: Oh! Those big, giant from the West Coast that are too big to even hug!

NATALIE: Then we have the sycamore.

LULU: Super tall, leafy ones. Lots of them in the middle of the country.

NATALIE: The last one is the Douglas fir.

LULU: Hmm! It's like a Christmas tree that are often Douglas firs, right?

NATALIE: Yes. They chose trees that could be grown all across the whole entire country.

LULU: Yeah.

NATALIE: And they put them in this aluminum metal canister. Very small, it fits in the palm of your hand. So 500 of these seeds fit in the palm of Smokey's hand.

LULU: Wow!

LULU: And so the day of the launch, he puts this canister of seeds in his little white fireproof bag, waves to the masses, and steps onto the spacecraft.

NATALIE: From a scientific standpoint, people just didn't know what would happen to a plant or a seed if you took it up into deep space.

LULU: Had no one ever taken one up before?

NATALIE: No. So this was the first time.

LULU: Huh!

LULU: And he had a scientific question.

NATALIE: What would happen if we brought another living thing up into space with us that's different than us?

LULU: Would it survive?

NATALIE: Yeah, would it survive? Would it grow differently? Would it look like a totally different kind of tree?

LULU: Because as Natalie explained, they knew that space affected humans.

NATALIE: When you're out in space, you're exposed to stronger radiation from the sun and galactic cosmic rays.

LULU: And this radiation can wiggle its way into your DNA, the blueprint that tells your body how to grow and potentially warp things. Plus, the lowered gravity can weaken your bones and muscles. And oddly, because of something about how time works in space, you age just a tiny bit slower!

ALAN: [singing] Which I still don't really understand but I gotta keep moving on with the story.

LULU: And so Smokey—and some of his fellow tree lovers at the forest service—wondered would space have an effect on the cells and DNA inside trees?

LULU: Did he have any hypotheses on how it—space travel might affect growth of these trees?

NATALIE: So I looked. There's nothing that indicates what he thought, except that he thought it was a cool idea. [laughs]

LULU: Okay. Well, lucky for you, Natalie, I put the question to a bunch of children.

NATALIE: Oh! [laughs]

LULU: And would you like to hear some of their answers?

NATALIE: Yes, I would!

[ARCHIVE CLIP, child: Maybe it would have to grow not with any water.]

[ARCHIVE CLIP, child: It would probably have different needs. Instead of, like, water, maybe something else, different chemicals helping it grow.]

[ARCHIVE CLIP, child: Maybe it would have to be growing on no gravity?]

[ARCHIVE CLIP, Lulu: So how would that make the tree look different?]

[ARCHIVE CLIP, child: So the branches would arch, and then turn into spirals.]

[ARCHIVE CLIP, child: Trying to go upwards a little higher because of just, like, the generally lower gravity on the moon.]

[ARCHIVE CLIP, child: And there's also gonna be berries. Golden berries, a brined berry.]

[ARCHIVE CLIP, child: Maybe, like, blue leaves?]

[ARCHIVE CLIP, child: Um, a white trunk.]

[ARCHIVE CLIP, Lulu: Ooh!]

[ARCHIVE CLIP, child: And it looks like a palm tree, but ...]

[ARCHIVE CLIP, Lulu: It looks like a what tree?]

[ARCHIVE CLIP, child: A palm tree.]

[ARCHIVE CLIP, Lulu: Oh, it's like a palm tree.]

[ARCHIVE CLIP, child: But, like, white and gray. But inside of the coconuts is a piece from the moon.]

[ARCHIVE CLIP, Lulu: Ooh! Is it hard or soft inside?]

[ARCHIVE CLIP, child: Tastes like yogurt.]

[ARCHIVE CLIP, child: And probably have a little metal in it.]

[ARCHIVE CLIP, child: Then at the end of them, they were like a little moon-like half crescents and full crescents and stuff like that.]

[ARCHIVE CLIP, child: And if you touch one, you'll start to feel, like, tingling in your hand. And if you give one to your animal, your animal will get this little moon shape on its forehead and then they'll be able to, like, fly and stuff.]

NATALIE: Oh my God, Lulu! These are so ...

LULU: I don't—I just put the question out. Isn't this great?

NATALIE: It just catches imagination, doesn't it?

LULU: Mm-hmm.

NATALIE: It's so fitting, Lulu, because it's really thanks to a third grader that we even know about this story.

LULU: Wait, what?

NATALIE: Yeah.

LULU: That story—plus blast off—after this short break.

LULU: Ten.

NATALIE: Nine.

LULU: Eight.

NATALIE: Seven.

LULU: Six.

NATALIE: Five four three two one ...

LULU: Thwoom!

NATALIE: Blast off.

LULU: Goodbye Smokey! Goodbye—what are the other names of the other astronauts?

NATALIE: Edgar Mitchell and Alan Shepard.

LULU: Goodbye, Ed! Goodbye, Alan! Goodbye fireproof bag full of seeds! Whee!

LULU: The fuel ignites. And on the outside the spacecraft looks pretty slow. But on the inside, everything is rattling. The metal rivets are groaning, and the seeds in the canister are bumping into each other. There's all this pressure from gravity trying to pull the spacecraft down. And then in one instant, it severs ties from Earth.

NATALIE: And suddenly, the seeds and the astronauts are floating in zero gee.

LULU: And Smokey aligns his measurements and lurches the spacecraft toward the moon!

[ARCHIVE CLIP, NASA: Stuart, how is your peanut butter?]

[ARCHIVE CLIP, Stuart Roosa: Not enjoying any peanut butter.]

LULU: This is audio from the actual space flight!

[ARCHIVE CLIP, NASA: Incredible.]

[ARCHIVE CLIP, Stuart Roosa: It's really a wild place up here.]

LULU: For four days they soar through space, as that little moon in the sky grows bigger and bigger and bigger.

[ARCHIVE CLIP, Stuart Roosa: It seems so close. It's like you can just reach out and touch it.]

LULU: Until they are right next to it.

[ARCHIVE CLIP, NASA: Stu, we just got word that your family is listening to you, and they're outside looking up at that great big moon. I'm sure we'd all like to be up there with you. Over.]

LULU: And then Stu, aka Smokey ...

[ARCHIVE CLIP, Stuart Roosa: Yeah, I wish you could be.]

LULU: ... releases Alan and Ed from the spacecraft to go land on the moon.

[ARCHIVE CLIP, Alan Shepard: Nothing like being up to your armpits in lunar dust.]

LULU: They get to go walk on the moon?

NATALIE: Yes.

LULU: Lucky Alan. Lucky Ed.

NATALIE: [laughs] Yeah.

LULU: And not only did they get to frolic around in moon dust, Alan brought a makeshift golf club and golf balls to hit.

NATALIE: Because of the gravity, you barely have to tap it and it just flies.

[ARCHIVE CLIP, Alan Shepard: Miles and miles and miles.]

LULU: I'm just picturing, like, it's like, [sings] Alan and Ed, playing on the moon. Bouncing, feeling, doing what they do. And Smokey doesn't get to go.

NATALIE: [laughs] Yeah. Well, that's what I thought.

LULU: Yeah.

NATALIE: But actually, for every moon mission where people land on the moon, there's one astronaut that stays in orbit around the moon. And it's a really important job, because that's everybody's ...

LULU: It's important, but it sounds less fun!

NATALIE: Okay, but you'll see why I say that. So the command module, so that's what Smokey is in ...

[ARCHIVE CLIP, NASA: Stu Roosa aboard Kitty Hawk.]

LULU: Okay.

NATALIE: He's gonna continue to orbit around.

[ARCHIVE CLIP, NASA: Eighth revolution of the moon.]

NATALIE: He's gonna take pictures. He's gonna do all these science experiments while he's ...

[ARCHIVE CLIP, NASA: Fifteenth ...]

[ARCHIVE CLIP, NASA: Nineteenth ...]

[ARCHIVE CLIP, NASA: Twentieth revolution of the moon.]

NATALIE: ... orbiting and orbiting and orbiting.

[ARCHIVE CLIP, NASA: The twenty-second lunar revolution. Twenty-three. Roosa's still apparently asleep.]

NATALIE: I think he orbits ...

[ARCHIVE CLIP, NASA: Thirty-second revolution.]

[ARCHIVE CLIP, NASA: Thirty-fourth.]

NATALIE: ... thirty-four times.

LULU: [gasps] The moon?

NATALIE: The moon.

LULU: Wow!

NATALIE: And what happens when you're orbiting the moon is that you end up going into the moon's shadow.

[ARCHIVE CLIP, NASA: Now passing over the backside of the moon.]

NATALIE: which is called the "far side" of the moon. And when you do that, everything gets really dark. You can't see the sun. It's cold, the temperature drops, things get, like, really clammy. And then you also lose contact with everyone on Earth.

[ARCHIVE CLIP, NASA: We have had loss of signal with the command module, Kitty Hawk.]

NATALIE: And everyone on the moon. Literally it's Stu "Smokey" Roosa and these seeds in his pocket ...

LULU: Are the only living things in that corner of the world.

NATALIE: Yeah.

LULU: Okay Natalie, you're not selling me. I'm ...

NATALIE: Well, let me—let me ...

LULU: You're just like, "You are the most alone person of the entire living human race."

NATALIE: Yeah.

LULU: You're cold. But get this! You're also clammy and it's pitch dark.

NATALIE: [laughs] Okay, so ...

LULU: And the other guys are, like, having fun bouncing and playing golf on the moon.

NATALIE: So yes, I left out the best part. So when you're going around, what happens is you suddenly see just this sheet of stars that just goes on forever and ever and ever.

LULU: Hmm!

NATALIE: The astronauts that have experienced that have just, like, plunged into that side of space that no one ever gets to see.

LULU: But he can't admire the infinite void forever, because he's starting to run out of gas. So he brushes by the moon, picks up Alan and Ed ...

[thanks, bro!]

LULU: ... lurches the spacecraft back toward Earth.

[ARCHIVE CLIP, NASA: We'll see you on the other side. Over.]

LULU: And start divebombing toward it, traveling at over 16,000 miles per hour, until ...

[boom!]

NATALIE: They splash down in the Pacific Ocean under these three huge orange and white parachutes.

LULU: Huh!

NATALIE: So the seeds made it back to Earth. They traveled so far. And then during the decontamination process, the cleaning process, there was an extreme change in pressure and the bag of seeds explodes.

LULU: [gasps] Oh, no!

NATALIE: So the seeds just exploded all over the place, and everybody thought that they had killed them.

LULU: But the show must go on, the science must go on. So they sent them to forest service greenhouses where they planted all the seeds in soil. The sycamore seeds, which looked like tiny green pistachio nuts, and the Douglas firs, which looked like scales plucked from a pinecone, and the sweetgums, and loblolly pines and the mighty redwood, which all begins in a tiny package that looks a little like a flattened corn kernel. And they watered them. And let the sun shine its warm rays. And then they waited. And they waited. And ...

NATALIE: Almost all of them came up.

LULU: [gasps] Whoa! And so that's how many little saplings are growing?

NATALIE: The estimate is 420 to 450.

LULU: Of the 500?

NATALIE: Yeah.

LULU: And are they seeing any difference in that growth? I think about our kids, and all the hypotheses and the spiral arms and the low gravity and the crescents. Like, was there—were they seeing any difference at first?

NATALIE: Actually, there was no difference.

LULU: At first. But trees, famously long living, take a long time to grow—sometimes hundreds of years to reach their full height. So to continue the experiment, NASA planted the baby moon trees all over the country.

NATALIE: There was a moon tree planted at the White House.

LULU: Huh!

LULU: At state capitols.

NATALIE: At NASA centers.

LULU: At a governor's mansion, a military fort.

NATALIE: But then they also got planted in front of a junior high, at a Girl Scout camp.

LULU: Huh!

NATALIE: Right outside of a cemetery. So just all of these places all over with regular people got these moon trees.

LULU: Yeah. Did anyone, like, get one in their yard?

NATALIE: Yes, people actually did.

LULU: Really? No! Just like Diane in Nebraska or whatever?

NATALIE: Yes. There are moon trees at private residences.

LULU: [laughs] How cool!

NATALIE: Yeah. The funny thing is, though, so when they would do these ceremonies, sometimes they would put a plaque in, but other times they would just have the ceremony and then go along their merry way. And over time, people started to forget that these were moon trees.

LULU: Time presses on. The Berlin Wall falls and the Mount St. Helen's volcano erupts and the trees keep growing, holding their secret inside. And Smokey Roosa dies, and you are born. And the moon keeps shining, and the experiment is mostly forgotten. Until one day, a little girl in Indiana, notices something funny at her Girl Scout camp—a sycamore tree with a little plaque.

NATALIE: Yeah, it just says, like, "Moon Tree, 1976."

LULU: Huh!

NATALIE: Nobody remembers even at the Girl Scout camp, like, what this was.

LULU: Wow!

LULU: So she tells her third grade class teacher, Ms. Goebel, about it.

NATALIE: Ms. Goebel emails NASA.

LULU: [laughs] Just says, "Hey, NASA! Dear NASA. Question."

NATALIE: Yes. [laughs] So the email finds its way to Dr. Dave Williams, who is a planetary scientist at NASA. And he doesn't know.

LULU: Oh!

NATALIE: And he told me that nobody remembered.

LULU: Wow!

NATALIE: And that there was no official record of where the trees had been planted. So Dave decides NASA should go on a recovery mission of sorts, and he starts a website that basically says, "If you have a moon tree or you know of a moon tree, let me know."

LULU: Wow!

NATALIE: And he started getting these emails from people who were like, "Hey, there's a moon tree in my plaza in my town. There's a moon tree in front of the hospital where I went."

LULU: Huh!

NATALIE: Slowly, he's collected locations of these moon trees as people have kind of rediscovered them in their own backyards.

LULU: And made kind of like a map?

NATALIE: He didn't make a map. I made a map.

LULU: [gasps] You made a map?

NATALIE: Yeah, it's pretty cool.

LULU: Wait, really?

NATALIE: Yeah. [laughs]

LULU: Cool!

NATALIE: In my map, you can spin the Earth, and then you can, like, click on your—to see what moon tree is close to you.

LULU: And we have this linked this on our website and right here in the episode description. Just click on "Natalie's moon tree map."

NATALIE: Here we go.

LULU: And Natalie ...

[ARCHIVE CLIP, GPS: For about 63 miles, continue straight.

[ARCHIVE CLIP, Natalie: We're gonna go find our moon tree now.]

LULU: ... realized there was one not too far from her in California, in a town by the sea called ...

NATALIE: San Luis Obispo.

LULU: Cool little surfing town.

[ARCHIVE CLIP, Natalie Middleton: I'm walking down some stairs and I see a little creek.]

NATALIE: And it took me a while to find it.

[ARCHIVE CLIP, Natalie Middleton: Holy cow. I found it!]

NATALIE: The plaque was very small. Like, I can see how people kind of just walk right by.]

[ARCHIVE CLIP, Natalie Middleton: And I'm gonna try to hug it, see if I can get my hands around it. Oh! Oh my gosh, not even—not even halfway around. [laughs] And it smells so good!]

NATALIE: And when I saw it, it was just—I actually got kind of emotional.

LULU: Huh.

NATALIE: Like, I went up to its trunk and I, like, touched its bark and I started to cry. [laughs]

LULU: Why?

NATALIE: Space exploration is one of those things where not that many people get to experience it, and yet it's something that humans have wondered about for millennia, ever since we could wonder we were looking at the stars and the moon. So to be able to touch a living thing that has actually traveled all the way to the moon and back and survived? It's a deep thing.

LULU: So for you the thing is like—is it almost like access? It's like almost getting to touch the moon?

NATALIE: It's poignant. I don't know—I don't know more of a kiddie word for that. It's like ...

LULU: Well, how would you describe poignant for someone who doesn't know what it means?

NATALIE: I would say it's like a joyful kind of ache. We usually tend to think of trees as rooted, and so to realize that these are travelers and that they've traveled so much farther than I will ever travel.

LULU: Yeah.

NATALIE: And then I looked up, and it just—it has—redwood trees have these huge kind of feathered branches that are just so beautiful. And there were, like, little threads of spider silk that were, like, catching the sun, little rainbows of spider silk. There was like a squirrel jumping around up there. There were birds. I kind of went and sat on a bench nearby, and there was a whole construction crew that was on lunch break, and they all went and sat under the leaves of this moon tree. And I'm pretty sure they had no idea that it had been to the moon.

[ALAN: [singing] I want to know the truth tangled in your roots, the things you've been through that make you you. I want to know the truth tangled in your roots. Every leaf, every tree holds a history tangled in the roots. Did you float through the shadows alone, surrounded by a silence that no one else knows? Tangled in the roots. Were you lost in the ocean of stars where it all fades to dark and the air goes cold? Tangled in the roots. Did you go to the dark side of the moon? Would you talk about the feeling, talk about the view? Tangled in the roots. Are you back down on the ground now, just waiting around now, humming a tune, waiting to bloom? Tangled in the roots, the things you been through that make you you. I want to know the truth tangled in your roots. Every leaf, every tree holds a history. Tangled in the roots. Spinning towards the stars. Do your branches spin towards the stars? Spirals of leaves defy gravity. Spinning towards the stars. Yeah, this journey we're traveling on, the spindle of secrets, sprouts from a seed. I want to know the truth tangled in your roots, the things you've been through that make you you. I want to know the truth tangled in your roots. Every leaf, every tree holds a history tangled in the roots.]

LULU: Alan Goffinski! Woo-hoo! And there is nothing else cool about to happen. What's that?

BADGER: Excuse me, I have a question.

BADGER: Me too.

BADGER: Me three.

BADGER: Me four.

LULU: The badgers! They're listeners with badgering questions for the expert. Are you ready?

NATALIE: Yes.

ALEX WINTER: Hi. I'm Alex Winter. Also known as Bill from Bill and Ted's Excellent Adventure.

LULU: [gasps] Most triumphant.

ALEX WINTER: My question is: is it true that time moves differently in space? Like, if I had a twin and he went to space, would we be different ages?

NATALIE: Oh yeah. Earth ages faster.

LULU: Oh, so if you went to space, you'd be younger?

NATALIE: So Scott Kelly and his brother Mark Kelly are identical twin astronauts that did a science experiment. Basically, Scott went up and stayed for almost a year in space.

LULU: Whoa!

NATALIE: And because of something known as the twin paradox, time passed more slowly for Scott up in space than for his brother Mark here on Earth. And what that means is that Scott returned to Earth younger ...

LULU: What?

NATALIE: ... than his brother Mark.

LULU: How much younger?

NATALIE: 8.6 milliseconds younger.

LULU: [sings] I don't understand, but I like it!

TOMMY: Hi, I'm Tommy, I'm 11 years old, and my question is, would NASA ever plant seeds in space?

NATALIE: They did.

LULU: They did?

NATALIE: Uh-huh. So they were called, like, the veggie experiments.

LULU: Okay.

NATALIE: In recent years, astronauts took vegetable seeds up to the International Space Station.

LULU: Whoa!

NATALIE: To see if they could grow them in hopes of, like, if and when we kind of push our way out to Mars, the astronauts are gonna have to grow their food. Like, they're not gonna be able to pack all the food they need.

LULU: Oh, right! Of course.

NATALIE: So Scott Kelly, the twin, part of what he was doing in space for that whole year was trying to grow plants.

LULU: Oh my gosh!

NATALIE: Yeah. But it's hard, because watering them—so when you water plants in space, the water beads up in microgravity, and it makes it really hard for it to reach the roots.

LULU: Hmm.

NATALIE: And so you have to sort of, like, force it into the soil. And NASA also was making him wear gloves so that he wouldn't accidentally get a mold or something from the soil. But the thing was is that with the gloves on, he couldn't tell if the flowers were getting enough water or too much water.

LULU: Oh, like he couldn't feel the soil, kind of?

NATALIE: Yeah. So finally, he ...

LULU: He broke the rules? Ripped off the gloves?

NATALIE: He took his gloves off! [laughs]

LULU: So he could feel the soil.

NATALIE: Yeah. And a little while later—check this out.

LULU: Oh my gosh, you are showing me a picture of these gorgeous orange flowers. Are these—are these—did these bloom out in space?

NATALIE: Yeah. These are called zinnias, and they bloomed in space.

LULU: [singing] Twinkle twinkle little zinnia.

THEO: Hi, my name is Theo and I'm nine years old. Does NASA have any plans to keep studying moon trees?

NATALIE: So the Artemis mission recently took seeds again to the moon.

LULU: Oh! So moon trees, part two!

NATALIE: Yeah, moon trees part two.

LULU: Okay, and I have one last question. By this point, have they located all of Smokey's original, you know, 450 moon trees?

NATALIE: No, there's just over a hundred that they know the locations of now.

LULU: Oh. So most of them are still missing?

NATALIE: Most of them are still out there growing. And nobody knows that they went to the moon.

LULU: But you can look for them, look for their little plaques. And if you find one, drop an email to Natalie [at] nataliemiddleton [dot] org so that she can add its location to her map and more people can also touch the moon—via tree.

LULU: And that'll do it for today. Thank you for listening. And thank you again, Alice Wong, for lending your voice to this program and to this world. I just published a longer remembrance about Alice. It's called "13 Questions I'll Never Get to Ask Alice Wong." And you can go check it out at Transom.org. And if you just want more Alice, she has left behind many books and podcasts and essays and even a film. And you can find them all at DisabilityVisibility.com.

LULU: And I figured I'd end today with Alice's own words the way she ended her own imaginary obituary. She wrote, "Instead of flowers, donations can be made to your local animal shelter, food bank, library or mutual aid collective." Enjoy all of Alice's good shit, and may you create some good shit as well.

[LISTENER: Hi. I'm Natalia and I'm from Brooklyn. And here are the staff credits. Radiolab is hosted by Lulu Miller and Latif Nasser. Soren Wheeler is our executive editor. Sarah Sandbach is our executive director. Our managing editor is Pat Walters. Dylan Keefe is our director of sound design. Our staff includes: Jeremy Bloom, W. Harry Fortuna, David Gebel, Maria Paz Gutiérrez, Sindhu Gnanasambandan, Matt Kielty, Mona Madgavkar, Annie McEwen, Alex Neason, Sarah Qari, Anisa Vietze, Arianne Wack, Molly Webster and Jessica Yung. With help from Rebecca Rand. Our fact-checkers are Diane Kelly, Emily Krieger, Anna Pujol-Mazini and Natalie Middleton.]

[LISTENER: Hi. I'm Danielle from Madrid. Leadership support for Radiolab's science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation.]

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