Season 25 Episodes17
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Astronomer Casper Farret Jentink works deep in the forests above Geneva on one of the biggest questions humanity has ever asked itself: are we alone in the universe? We are born alone, we die alone, and in between we try to understand what it means
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"Are we alone in the universe?" is episode 15 of Backlight season 25. It aired on December 24, 2025.