58 minSeason 61 • Episode 4
LatestJim watches primates in action to see how they tackle survival challenges, revealing the clever tricks that shaped the brain's thinking. But the real breakthrough came when brains learned to be social. Teaming up with his wife, Jim investigates how relationships and friendships made people more intelligent. With AI getting smarter by the day, Jim wants to know what makes biological brains so special. Through scans, fossil discoveries and cutting-edge research, he uncovers what makes the brain so hard to emulate.
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Writing
Scripts that respect your intelligence without gatekeeping.
Production
Six decades of archival curiosity — history itself.
Editing
Pacing that trusts viewers to keep up.
Trivia, insights & behind the scenes
Horizon launched the same year as Doctor Who — BBC basically owned British wonder that week.
The show's archive is a time capsule of scientific hubris and humility; watch decades apart and witness entire paradigms crumble and rebuild.
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