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Caroline’s away, so Lindsay Sant and Lino Saubolle tackle Pope Leo’s teaching on human dignity, subsidiarity, and the common good — then pivot to five citizen-science projects you can join this week, from mosquito traps to Martian clouds.

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Two ways to build: a tower that scatters everyone who raises it, or a wall rebuilt family by family. Lindsay Sant, Caroline Knight, and Lino Saubolle take on part one of Pope Leo XIV’s Magnifica Humanitas — plus sugar found in deep space.

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Can the Church keep humanity at the center of the AI age? Dom Bettinelli joins Lindsay Sant and Caroline Knight on Pope Leo’s encyclical Magnifica humanitas, a radiation-eating Chernobyl fungus, and StarQuest’s 20th year.

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Never accept a label in place of a story. Lindsay Sant brings notes from Melbourne’s Proclaim 26 evangelization conference, Caroline Knight reports on 59,000-year-old Neanderthal dentistry, and Lino Saubolle weighs in.

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Young Australians are returning to faith at rates nobody predicted. Archbishop Peter A. Comensoli tells Lindsay Sant, Caroline Knight, and Lino Saubolle what’s behind it, and what St Patrick’s Cathedral has to do with it.

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Can a book teach an eight-year-old who God is — or carry a couple through a lifetime of marriage? Publisher Michael Murphy talks YOUCAT with Lindsay Sant, then Caroline Knight tells the true story of voices that diagnosed a brain tumour.

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Could an architect-priest who built churches with his own hands become a saint? Lindsay Sant sits down with archivist Odhran O’Brien on the cause for Monsignor John Hawes — then a new study explains why some days you’re sharp and others you’re not.

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A Catholic mission leader is walking 2,500 kilometers through the Australian outback to raise $1 million for homeless services, inspired by Pope John Paul II. Lindsay Sant, Caroline Knight, and Lino Saubolle interview Roby Curtis. Plus the science of Bruce the champion Kea.

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“Nothing is lost by peace. Everything may be lost by war.” Pope Leo XIV’s Vigil for Peace, just war theory, and the Artemis II lunar mission — Lindsay Sant, Caroline Knight, and Lino Saubolle cover it all.

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God kneels before his creation — and then tells us to do the same. Lindsay Sant and Lino Saubolle unpack Pope Leo’s Holy Thursday homily on servant love and the Eucharist. Plus: Caroline Knight on scientists who froze mouse brains and brought them back.

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Is a cathedral restoration a luxury or a mission? Lindsay Sant, Caroline Knight, and Lino Saubolle make the case for Melbourne’s $190M “Light into the City” campaign — then turn to CRISPR-engineered mushroom protein and why scientists should never name products.

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Is faith a duty or a need? Fr. Alex Busuttil, MSP—a missionary priest from Peru—unpacks vocation, marriage, and 40 years of mission with his nephew and niece, Lindsay Sant and Caroline Knight. Also: ancient tree-climbing crocodiles that ambushed prey from the canopy.

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Lent gets real: Lindsay Sant, Caroline Knight, and Lino Saubolle unpack Pope Leo’s call to listen deeply, fast from harmful words, and rebuild community—then Caroline flips to space with Betelgeuse’s hidden companion star. What if your words are your Lenten fast?

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Grief reshapes everything—but does it also reveal deeper hope? After losing his mother, Lindsay Sant reflects on faith, love, and C.S. Lewis’s wisdom. With Lino Saubolle, he asks: How do we carry loss—and each other—forward?

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Can the Church truly claim to love the poor if she remains silent on their suffering? Lindsay and Lino unpack Dilexi Te, Pope Leo’s’ challenge to the Church—and to us—to act. They also reveal surprising health perks of your daily coffee fix.

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What does it mean for the Church to truly be “for the poor”? In this conversation, Lindsay Sant, Caroline Knight, and Lino Saubolle unpack Pope Leo’s challenging teaching and its modern implications, then shift to a wild scientific twist involving King Tut’s tomb.

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Is ignoring the poor a rejection of Christ? Pope Leo thinks so. Caroline busts the paracetamol-autism myth with science and empathy. Featuring Lindsay Sant and Caroline Knight.

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Can sainthood thrive in the modern world? Lindsay Sant, Lino Saubolle, and Dom Bettinelli reflect on Dom’s pilgrimage across Italy, Eucharistic miracles, relics, papal moments, and the bold holiness of Carlo Acutis and Pier Giorgio Frassati.

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What does it mean to welcome the stranger in today’s Australia? Lindsay Sant, Caroline Knight, and Lino Saubolle tackle the bishops’ new pastoral letter, racism, and faith—and lighten the mood with dancing cockatoos.