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The Optimist Daily's Weekly Roundup

Do you like the stories from around the world that recognize and celebrate the people and events making a positive change? Tune in to The Optimist Daily's Weekly Roundup, where our solutions-focused stories continue, and hear behind-the-scenes discussions from the people bringing you the news.

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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 industry from the inside, and what it's like to start over somewhere new when you didn't really pick the…

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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 down really is the solution. Transcript link: https://www.optimistdaily.com/?p=1422764 If you have…

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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 solutions this week with Arielle and Karissa. Also in the episode: energy storage technologies that sound…

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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 into the neurological reason summer keeps slipping away, an Oxford trial where eight weeks of salsa…

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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 this week with Arielle and Karissa, including the first gallery in history dedicated entirely to women…

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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 first exome therapy for burn patients, a California canal that generates electricity while cutting…

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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 that feels almost too good to be true. Alongside that, Arielle and Karissa cover the two heat domes…

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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, Pakistan scrapping its period tax after two young lawyers made it too hard to ignore, a farmer in rural…

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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, physical method for turning rubble into building blocks, while living inside the rubble. Arielle speaks…

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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 scientists for over a century, a California city that voted to permanently ban data centers, and France…

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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 suppressed. Cleared. Arielle and Karissa also get into a 55-year study proving that banning toxic forever…

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