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 inst...
18 Sep 23min
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 ...
11 Sep 22min
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 th...
4 Sep 26min
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 unsolicite...
28 Aug 21min
(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 ...
21 Aug 26min
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...
14 Aug 3min
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 t...
31 Juli 28min
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 popu...
24 Juli 28min
