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 on setting health boundaries without drama, explain how the new THOR-05F model closes a decades-long safety gap for women and smaller drivers, and share a quick round-up of other uplifting stories from The Optimist Daily.

They also spotlight an excerpt from Barnet Bain's upcoming book How to Be a Friend in an Unfriendly World and explore how deeper friendship and human connection can be powerful tools for personal and collective well-being. (You can read the excerpt and preorder the book here.)

Transcript link: https://www.optimistdaily.com/?p=1421212

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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 invite anyone who isn't already to support the work through donations, shares, and word of mouth.

Transcript link: https://www.optimistdaily.com/?p=1421174

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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 across the world. Next: surprising new research revealing how art gallery visits (and even looking at reproductions) can measurably lower stress and inflammation.

Plus, find out a little more about Swim Sista Swim, Hands United, Move Over Bob, and Amy Howlett-Johnson, our featured Changemakers these last couple weeks. And meet this week's inspiring Local Changemakers: Shower The People and Bounty & Soul.

It's a hopeful, human-focused episode full of community, creativity, and small changes driving meaningful impact.

Transcript link: https://www.optimistdaily.com/?p=1421119

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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 inspiring Local Changemakers — the Oregon senior dog rescue, Silver Linings Rescue Ranch, and PeaceCYCLE — both proving compassion can fuel sustainability and hope.

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Transcript link: https://www.optimistdaily.com/?p=1420998

The Optimist Daily is a project of the World Business Academy.

Donate link: https://www.optimistdaily.com/donate-to-support-the-optimist-daily/?gift=Y%20http://

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 storytelling thrive when communities care.

Discover more about LitBox at www.litboxbooks.com or follow @LitBoxBooks on X for the latest.

Transcript link: https://www.optimistdaily.com/?p=1420951

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The Optimist Daily is a project of the World Business Academy.

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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 break down the science behind both discoveries—and how they might shape the future of our cities and our health.

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Transcript link: https://www.optimistdaily.com/?p=1420895

The Optimist Daily is a project of the World Business Academy.

Donate link: https://www.optimistdaily.com/donate-to-support-the-optimist-daily/?gift=Y%20http://

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 findings can teach us about resilience, biology, and the future of health. A thoughtful conversation about stewardship, survival, and what it means to care across generations.

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Transcript link: https://www.optimistdaily.com/?p=1420855

The Optimist Daily is a project of the World Business Academy.

Donate link: https://www.optimistdaily.com/donate-to-support-the-optimist-daily/?gift=Y%20http://

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 plunges, and why ultra-processed foods may be on their way out of California school lunches. It's a speedy, feel-good listen packed with health and sustainability wins.

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Transcript link: https://www.optimistdaily.com/?p=1420817

The Optimist Daily is a project of the World Business Academy.

Donate link: https://www.optimistdaily.com/donate-to-support-the-optimist-daily/?gift=Y%20http://