> ## Content Index
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# What If Humanity Is Among The First Spacefaring Civilization
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/what-if-humanity-is-among-the-first-spacefaring-civilization-p47n5d/
- Published: 2024-04-02T23:12:18.000Z
- Updated: 2025-08-21T13:46:41.000Z
- Description: Let’s see how if alien civilizations will ever reach us.
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 8, Episode 32, #ZZZ_Episode_3e35c5bf-95e7-4430-a32d-1de3d452de3b, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

Half of the universe is filled with expansionist alien civilizations, and it’s only a matter of time before they’ll reach us. OK, that sounded a little sensationalist. But it’s also the conclusion of a recent astrophysics paper. Let’s see how they figure this, and whether we should take it seriously