# Daniel Epstein

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The Battery Built for Traffic Lights, Now Powering AI Data Centers.

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ZincFive is the world's leading nickel-zinc battery company. Its batteries cannot be forced into fire, are over 90 percent recyclable through a smelter-free chemical process, and deliver power in millisecond bursts that lithium cannot match on its own. Nearly 2 gigawatts are deployed or under cont…

Renewable Energy That Saves India’s Factories 40% on Their Power Bill

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Fourth Partner Energy finances, builds, and operates renewable energy for India’s factories. Clients save 30 to 40% on their power bills and pay nothing upfront to switch. The company now serves over 400 clients across 23 states, has raised $475 million, and is building a gigawatt of clean energy a…

She Built the World’s Largest Food-Sharing App

Tessa Clarke is the co-founder and CEO of Olio, the number one food sharing app on earth. Olio connects people with their neighbors so spare food and household items get given away rather than thrown away: 10 million people have joined, items have been shared in 63 countries, and 150 million meals'…

245 Celebrating the Fourth

It wasn’t always fireworks on the fourth. John Adams predicted Americans would celebrate the Second of July, the day Congress voted in favor of independence, "with Pomp and Parade, with Shews, Games, Sports, Bells, Bonfires and Illuminations from one End of this Continent to the other." He got the…

216 A History of Stepfamilies in Early America

What do George Washington, Benjamin Franklin, and Abraham Lincoln have in common? They all grew-up in blended or stepfamilies. Lisa Wilson, the Charles J. MacCurdy Professor of American History at Connecticut College and author of A History of Stepfamilies in Early America, takes us through the …

215 A Same-Sex Marriage in Early America

We tend to view gay marriage as a cultural and legal development of the 21st century. But did you know that some early Americans lived openly as same-sex married couples? Rachel Hope Cleves, a Professor of History at the University of Victoria in British Columbia and author of Charity and Sylvia…

She turned London’s retired fire hoses into a luxury brand

Kresse Wesling CBE is the co-founder of Elvis & Kresse, the British company that has rescued decommissioned London fire hose from landfill since 2005 and turns it into luxury bags, belts and accessories. Half the profits from the fire hose range go to the Firefighters Charity. The first year that c…

The Lived Informatics Model

The data we collect about ourselves can tell us a lot—but only if the technology collecting it actually fits into our lives. Daniel Epstein explores personal informatics, from fitness trackers and food journals to baby tracking and AI, and explains why abandoning a tracking tool doesn't necessarily…

She's Making Food Taste Just as Sweet With 75% Less Sugar

Ali Wing is the CEO of Oobli, a food biotech company in Davis, California that makes sweet proteins through fermentation. Sweet proteins were first found in fruits and berries at the top of the rainforest canopy in West Africa and Southeast Asia. They are about 1,000 times sweeter than sugar by we…

Ep 273 — Trump v. Voters

DOCKET ALERTS: Alina Habba is newly married and locked in a knife fight with fellow Trumplander Ric Grenell. She says he failed to deposit a $6 million check to the Kennedy Center. And — hey, what a coincidence! — a week later, the New York Times reported that Habba got a $50 million contract…