PODCAST · news
The Optimist Daily's Weekly Roundup
by The Optimist Daily
The world is solving hard problems. We cover them! Every Friday, Arielle and Karissa dig into the week's best positive solutions news from The Optimist Daily. Plus, monthly guest interviews with the innovators and advocates making it happen.
Episodes
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Hungary repeals anti-LGBTQ law, world's tallest wind turbine, and why fall makes you reach for reruns
Germany just finished building the world's tallest wind turbine: 1,197 feet tall, and built without a crane. They had to invent an entirely new construction method because cranes don't even go that high. Also this week: the Hungarian law that fell in the most unexpected way, a Spanish explorer...
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Flu is already spreading: why October is the window to get vaccinated, plus nine more solutions
Arielle and Karissa cover ten solutions this week, including 20,000 octopuses hiding in well-studied waters off the California coast, what Indonesian mosque loudspeakers have to do with earthquake survival, and a garden chore you now have a very good reason to skip. Transcript link:...
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(Guest Interview) A place to breathe: inside #CreateConnectCare, the youth mental health program giving young people a voice | World Mental Health Day 2026
If you have a teenager in your life and you've felt them pull away from conversations you used to have easily, this episode is for you. Kathy Saulitis has spent three years going through what young people write and create when nobody is grading it: the poems, drawings, essays, and songs submitted...
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A wildlife overpass, a solar train, and Japan's massive centenarian population
This week Arielle and Karissa cover the Colorado wildlife overpass that came in $15 million under budget and brought pronghorn back to habitat they hadn't reached in decades, what Japan's 107,000-plus centenarians reveal about diet and aging, Dolly Parton's Imagination Library expanding in London...
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The tilcayo, cancer-sniffing dogs, and 8 more things going right
There's a startup training dogs to detect cancer across seven types… and there's over 90 percent accuracy across six hospitals. This week Arielle and Karissa also cover a wildcat species science just got around to naming (local communities already had a name for it), bison reshaping a Mexican...
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A 450-year map mistake gets corrected by 164 countries, plus nine more solutions
Most world maps show Greenland and Africa as roughly the same size… which is kind of unbelievable considering Africa is 14 times larger! This error has been built into classrooms, boardrooms, and institutions since 1569. Last week, 164 countries finally voted to fix it. Arielle and Karissa also...
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NYC bans AI for 500,000 students, and seven other solutions
An approach to treating degenerative blindness has been in development for more than ten years across research institutions in Spain. The result is not a surgery, a gene therapy, or an implant. It is eye drops. Light-activated compounds that restored vision in blind animal models by stepping in...
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AI music banned from Australia's charts, Roman telescope launches, a biodegradable balloon and much more!
Arielle and Karissa are reunited after a few weeks apart, covering a wide range of solutions this episode: a new telescope that survived two White House cancellation attempts, the decade-long trial that settles the statin-and-dementia debate once and for all, and a biodegradable balloon that took...
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Niger restored 5 million hectares without planting a single tree plus nine other things going right
Karissa hosts solo this week while Arielle recovers, covering ten solutions including the world's first wild bird flu vaccination program for Phillip Island's little penguins, France making unsolicited telemarketing calls flat-out illegal, and what Baltimore is doing with $400 million in opioid...
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(Guest Interview) Catch up with Kristy: clean energy, leaving California, and embracing the slow life
Many of the long-time listeners of The Optimist Daily's podcast will recognize Kristy Jansen's voice. She's the former co-host and Executive Director of this show, and she's back, joining Arielle and Karissa from Mérida, México, to catch them up on what happened in between: the clean energy...
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Taking our own advice on slowing down this summer
Arielle checks in solo to explain why the Kristy guest episode is getting a little more time. Both she and Karissa have been doing what they always say matters most: showing up, fully present, for the people they love. Babies, weddings, miles between people who love each other. Sometimes slowing...
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Liquid air batteries, dolphins saved by plastic bottles, and an empty weekend a month
Dolphins fatally swim into fishing nets because the nylon is acoustically too similar to water for their echolocation to pick up. A researcher at Newcastle University wondered if attaching something that does produce an echo might change that. The dolphin-saving solution may surprise you. Ten...
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The science of soccer-stress, salsa dancing for depression, and why summer slips away
Watching a tense soccer match nearly doubles cardiac event risk, and cortisol could start rising fourteen hours before kickoff. With Spain just taking the World Cup, a fair portion of the world's population has basically been running a biological experiment on itself. Arielle and Karissa also get...
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Wildfire satellites, Seine city cooling, and parenting securely attached kids
Greece just launched the world's first satellite constellation built specifically for wildfire detection. It can spot a fire measuring only a few feet across, a huge improvement on conventional satellites, which start flagging fires when they're already the size of a cruise ship. Ten solutions…
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500 years of the soccer cleat, a world-first burn treatment, and green hydrogen in California
Every player at this year's World Cup is wearing the end result of 500 years of iteration on a single piece of equipment. It started with factory workers hammering hardware store nails into their boots for traction on wet British turf. Ten solutions this week with Arielle and Karissa: the world's...
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Coffee waste as fuel, Nepal same-sex marriage rights, and understanding heat domes
Stanford researchers took cartilage from patients already getting knee replacements (about as degraded as joint tissue gets) and discovered how it could regenerate itself. The cells weren't replaced or reprogrammed; they just shifted back toward a younger pattern of behavior, which is the part…
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Gig worker rights, cervical cancer wins, and a hopeful take on human cooperation
A study of more than 100,000 people across 125 countries found that people cooperate far more than they assume other people will. Hopeful news to receive in a world that feels so divided. This week Arielle and Karissa also cover gig worker rights getting their first-ever international vote,...
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(Guest Interview) Hope can rise: two sisters in Gaza turning rubble into building blocks | Earth Prize 2026
Tala and Farah Mousa received thousands of messages after they won the Earth Prize. "You gave us hope we had completely lost," people wrote. "You showed us we can be seen." They were sheltering in a tent when those messages came in. This episode is about what it takes to build something: a real,...
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From a 340-year slavery law finally repealed to pancakes for cigarette butts: 10 solutions this week
A high-risk breast cancer diagnosis used to mean one thing: chemotherapy. A large UK trial just found that 68 percent of those patients could skip it safely, based on a genomic test that already exists and is already in use. Arielle and Karissa also get into the pigeon liver finding that stumped...
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Pancreatic cancer cracked, hepatitis B cleared, and wild mice who run for joy
An oncologist cried at her desk when she read these latest trial results. Researchers put exercise wheels in empty fields and sand dunes, and wild mice found them and ran, unprompted, for no reward. A new drug just cleared hepatitis B from the body entirely for one in five patients. Not…
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David Attenborough's 100-year secret and seven other solutions this week!
Sir David Attenborough just turned 100! Arielle and Karissa cover his 10-minute secret to a long life along with seven other solutions this week — belugas who prove that their species is capable of recognizing themselves, hemp plastic that survives boiling water, and an ocean sanctuary that might...
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(Guest Interview) She calls herself a mermaid now: How Swim Sista Swim Is Changing Who Belongs in the Water
Stephanie McKenzie has been swimming since she was a child. She came to Swim Sista Swim as an instructor and, as you'll hear in her voice, is a vibrant and confident woman on all counts. Yet she still feels a twinge of doubt every time she walks into a public pool alone, still notices that more...
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Gene therapy restores hearing, Gaza teens win a global prize, and eight more wins
Europe's first stadium built exclusively for women's football is going up in Brighton! And the most interesting design decision wasn't the pitch. It was the size. Arielle and Karissa cover ten solutions this week, including a single injection that gave a child her hearing, two teenage sisters in...
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Antarctic whales by the hundreds, the UK's generational smoking ban, and more positive news this week
For the first time in history, clean energy grew faster than global electricity demand and fossil fuel generation actually went down. That's not even the most surprising thing in this episode. Arielle and Karissa cover ten solutions this week, including a UK law that bans the legal purchase of...
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Good news for donkeys, rats, wildflowers, and people who hate step trackers
This week, a 58-day protest campaign just convinced Etsy to ban all animal fur starting this August. Germany spent decades digging coal out of the ground, leaving craters 200 feet deep. This month, the last one opened for swimming. And Cambodia unveiled the world's first statue dedicated to a...
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Why you keep falling for the same person, and 9 other things worth discussing this week
This week: a German research team built a water contamination test that runs on a smartphone and gives you an answer in under a minute. A Cornell professor has a gardening trick that involves water, a paper towel, and one night. A Bristol startup figured out what to do with festival urine!…
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(Guest Interview) Given Two Weeks, She Lived a Year: The Woman Who Built a Rescue for the Dogs Everyone Overlooks | National Pet Day 2026
In honor of National Pet Day, Arielle sits down with Erica Psaltis, founder of senior dog rescue Silver Linings Rescue Ranch in Bend, Oregon. They talk about what actually goes into running a rescue like this: the intake process, the misconceptions people have about older dogs, the losses, and…
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Good Friday good news: speed friending, fire fungi, and the science of sleep
This week starts with casino Easter eggs and a prom-posal, because apparently Good Friday is full of surprises. Then Arielle and Karissa get into the actual news: a teenager built a working microplastic filter in her garage, Mexico's monarch butterflies had their best winter in nearly a decade…
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Touching the Veiled Christ, urban coyotes, and the truth about your allergies
Arielle and Karissa are back this week, and the stories span everything from marble sculptures in Naples to coyote dens in American cities. A museum in Naples opened its barriers so blind visitors could touch the Veiled Christ, led by blind guides who know that experience firsthand. Urban coyotes...
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From psilocybin to ocean robots: 10 solutions you'll actually want to hear about
This week, Arielle and Karissa cover a tiny African island paying locals to protect its rainforest, the lion DNA case that just sent two poachers to prison, and new research on music, overthinking, and quitting smoking. Oh, and the hummingbirds are on their way. If you have questions, comments,...
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Golden frogs are back, bacteria are eating cancer, and cherry blossom season is almost here
Spring is in the air, and so is this week's roundup of solutions, breakthroughs, and good news worth sharing. Arielle and Karissa are back together after last week's Sambhali Trust guest interview, and they've got a full lineup: wildlife conservation wins, medical milestones, an environmental...
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(Guest Interview) From 18 Women to 80,000: How Sambhali Trust is Empowering Girls in India | International Women's Day 2026
This episode is dedicated to Badan Kanwar. In the early 1990s, a woman named Badan Kanwar was widowed in Rajasthan, India. Her world shrank the way it does for widows there — she lost status, voice, and belonging. Her son, Govind Singh Rathore, watched. Years later, he founded Sambhali Trust in...
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New Year, New Us: The Optimist Daily Weekly Roundup goes bigger with 10 solutions
It's our first episode of the year! And the Optimist Daily Weekly Roundup is officially refreshed. Karissa and Arielle kick off the new format (hello, "tasting menu" of all ten weekly solutions), explain the difference between Emissaries and Optimists, and share a new perk: Emissary shout-outs...
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Holiday gifts for a loved one with cancer + a powerful Miwuk land-back victory near Yosemite
This week, Arielle and Karissa dive into two very different but deeply connected stories about what it means to truly support healing. First, we unpack new research on what people going through cancer actually find helpful during the holidays, and why practical support often means more than cozy...
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Should kids be banned from social media? Inside Australia's bold online safety experiment
Australia just became the first country to ban social media accounts for kids under 16... but will it actually keep them safer online? In this episode, Arielle and Karissa unpack the data that pushed lawmakers to act, the huge loopholes critics are worried about, and the real trade-offs for…
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Holiday health etiquette plus the first female crash test dummy is (finally) here
This week, Karissa and Arielle tackle two big, very real-world solutions: how to gracefully ask friends and family if they're sick before a holiday hangout, and why the U.S. finally introducing its first female crash test dummy is a major win for road safety and equity. They unpack expert advice…
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Thankful for optimists: a Thanksgiving shout out to The Optimist Daily community
In this special Thanksgiving mini-episode of The Optimist Daily's Weekly Roundup, Karissa and Arielle press pause on the usual headlines to say thank you. They share what they are personally grateful for this year, celebrate the Emissaries and listeners who keep solutions journalism alive, and...
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From bike buses to art therapy: The uplifting solutions changing everyday life
In this week's episode of The Optimist Daily's Weekly Roundup, Arielle and Karissa return from a fall break with a fresh wave of uplifting stories, diving right into two standout solutions of the week. First: the "bike bus" phenomenon turning school mornings into joyful, community-powered parades...
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The science of saving lives: new breakthroughs in immunity and allergy prevention
In this week's episode, Arielle and Karissa gab about two groundbreaking medical solutions changing lives: a one-time gene therapy that helps children with ADA-SCID develop healthy immune systems, and new pediatric guidelines that could drastically reduce peanut allergies. Plus, meet this week's...
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From chemo care to creative flair: two stories changing how we heal and create
This week, Arielle and Karissa talk about two powerful wins for compassion and creativity. New York's new law makes scalp cooling treatments more accessible for cancer patients, while a D.C. author reimagines book access with her "LitBox" vending machine. Together, they remind us that healing and...
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Can concrete power cities? Can aspirin prevent cancer? The science says maybe.
This week, Arielle and Karissa spotlight two game-changing breakthroughs: MIT's new battery concrete, which could turn buildings into energy storage devices, and a Swedish study showing that low-dose aspirin may significantly reduce the risk of colorectal cancer recurrence in certain patients. We...
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Why women live longer (and what men can learn from it) + the world's first Indigenous-led ocean reserve
In this episode, Karissa and Arielle begin in the Pacific Islands, where Indigenous leaders are creating the world's first ocean sanctuary designed to preserve migratory routes across national borders. Then we turn to the science behind why women tend to live longer than men—and what those…
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Bite-Sized Roundup: Cold Plunges, Kimchi, and Global Wins for the Planet
Arielle opens the episode with a quick update—she's feeling under the weather, so Karissa is taking the reins this week. In this bite-sized round-up, Karissa highlights some of the most intriguing stories from Optimist Daily, including science-backed benefits of kimchi, fresh debates around cold...
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Underground libraries, rethinking BFFs, and other uplifting solutions
In this week's Optimist Daily Roundup, Arielle and Karissa explore solutions that inspire connection and community. From Warsaw's new underground library that encourages commuters to swap scrolling for stories to expert insights on why you don't need one "best friend" to feel fulfilled, the…
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Hope after heartbreak: divorce support in India and 7 uplifting benefits of getting older
This week, Karissa and Arielle dive into stories of transformation. From India's empowering divorce retreats to science-backed reasons to embrace aging with open arms. They discuss why aging might just be the best chapter of your life (spoiler: less stress, more joy), how one woman's loss became…
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5 simple fitness tests for longevity + turning wind turbines into tiny homes
In this week's roundup, Arielle and Karissa explore two powerful solutions shaping the future of health and sustainability. First, discover how five simple fitness tests—like balancing on one leg or your natural walking speed—offer surprising insights into longevity and independence as we age....
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Celebrating Local Changemakers: Nominate Your Community Heroes of 2025
This week, Arielle spotlights the return of our Local Changemakers Series! From food justice in Olympia to climate activism and dog rescue in Thailand, last year's nominees inspired us with their creativity and compassion. Now we're inviting you to nominate the people and projects making a...
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How Adults Can Capture Back-to-School Joy, and How Rocky Mountain National Park is Expanding Access
This week Arielle and Karissa are exploring solutions both personal and global—from Rocky Mountain National Park's inspiring accessibility upgrades to playful ways adults can tap into back-to-school energy. They also take time for an I'm an Optimist, But… reflection on women's safety, a reminder...
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From mind-reading BCIs to ER-proof life tips: this week's top 10 innovations
This week on the podcast, Arielle and Karissa explore surprising yet powerful solutions—from Stanford's breakthrough brain-computer interface that decodes inner speech (complete with a mental privacy password!) to the top five preventable injuries that send people to the ER—yes, avocado hand is…
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Hormone-free male birth control + one-minute wellness check-ins
This week, Arielle and Karissa explore two powerful shifts in health and wellness. First, they dive into YCT-529, a promising hormone-free male birth control pill that may finally bring more balance to reproductive responsibility. Then, they share a simple but impactful habit: a one-minute daily...
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ABOUT THIS SHOW
The world is solving hard problems. We cover them! Every Friday, Arielle and Karissa dig into the week's best positive solutions news from The Optimist Daily. Plus, monthly guest interviews with the innovators and advocates making it happen.
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The Optimist Daily
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Frequently Asked Questions
How many episodes does The Optimist Daily's Weekly Roundup have?
The Optimist Daily's Weekly Roundup currently has 696 episodes available on PodParley. New episodes are automatically indexed when they're published to the podcast feed.
What is The Optimist Daily's Weekly Roundup about?
The world is solving hard problems. We cover them! Every Friday, Arielle and Karissa dig into the week's best positive solutions news from The Optimist Daily. Plus, monthly guest interviews with the innovators and advocates making it happen.
How often does The Optimist Daily's Weekly Roundup release new episodes?
The Optimist Daily's Weekly Roundup releases new episodes frequently with a large back catalog of 696 episodes. Check the episode list for recent publication dates.
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The Optimist Daily's Weekly Roundup is created and hosted by The Optimist Daily.
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