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The Netflix documentary “A Trip to Infinity” is a wild ride, filled with animated shorts by artists from 11 different countries illustrating the concept of infinity and where to find it.

Infinity comes in different sizes. The idea of a world with more than one kind of infinity is glorious and also incomprehensible. Can you add, subtract and divide with infinity? 

Our walking journey in the footsteps of Dorothy Day begins in Union Square in New York City, where the first Catholic Worker newspaper was distributed in 1933, and continues to St. Francis Xavier Church, where a tapestry of Day looks over all who walk through the doors.

At Manhattan University and on the Staten Island ferry, the “Dorothy Day,” theologian Kevin Ahern and George Horton and Carolyn Zablotny, who are all working toward Day’s canonization, talk with Shannon about the future of the Catholic Church and what it means to be a saint.

Longtime Catholic Worker volunteer and resident Jane Sammon and former Maryhouse chaplain Fr. Geoffrey Gneuhs tell Shannon about Dorothy Day's life at Maryhouse, the Lower East Side community that feeds and houses the poor.

A group of scientists, philosophers and writers discuss and debate the many different kinds of “intelligence” — and why we’re still grappling with our understanding of sentience in plants, animals and AI. Is a robot dog actually smart?

At the Galileo Museum in Florence, there’s a dazzling collection of old scientific instruments, including the telescope Galileo used to discover new moons. Cosmologist Marcelo Gleiser explains how Galileo revolutionized the scientific worldview.

At a small think tank in Italy, scientists and philosophers debate the nature of intelligence. Dartmouth neuroscientist Peter Tse traces the evolution of human intelligence — and says our imagination is both our greatest gift and deadliest weapon. 

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