Theoretical physicist Professor Jim Al-Khalili goes on a journey through 600 million years of evolution to uncover how the human brain, the most complex structure known in the universe, came to exist. With some 100 billion neurons and over 100 trillion connections - more than all the stars in the Milky Way - the human brain is one of nature's greatest achievements. But how did something so incredibly sophisticated evolve from its simple beginnings?
| Title | Horizon - Season 61 Episode 3 : Secrets of The Brain (1) |
|---|---|
| Alternative Titles | BBC Horizon |
| Subtitle Available |
 ETC.
|
| First Air Date | 1964-02-04 |
| Last Air Date | 2025-10-06 |
| Number of Episodes | 1173 |
| Number of Seasons | 61 |
| Genres | Documentary, |
| Networks | BBC Two, |
| Casts | |
| Plot Keywords | , |
Episodes List
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Horizon Season 61 :Episode 1 Confessions of a Brain Surgeon Confessions of a Brain Surgeon
2025-08-18Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 61 :Episode 2 Disease X: Hunting the Next Pandemic Disease X: Hunting the Next Pandemic
2025-09-22Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 61 :Episode 3 Secrets of The Brain (1) Secrets of The Brain (1)
2025-09-29Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 61 :Episode 4 Secrets of the Brain (2) Secrets of the Brain (2)
2025-10-06Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
