Horizon: Secrets of The Brain (1)

58mAired 2025-09-29

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?

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Episodes

Season

4 episodes

Horizon: Secrets of The Brain (1)

Confessions of a Brain Surgeon

Disease X: Hunting the Next Pandemic

Secrets of The Brain (1)

Secrets of the Brain (2)