Hey, let me ask you, sir, have you heard George's podcast?

Me and Ben Brick are back with a blast, this time with stories from Africa's past.

Not too distant, unsolved mysteries, unsung hero's from untold histories, I'm trying

to make sense of the present day, join me on this journey by pressing play.

Have you heard George's podcast?

Chapter 4.

Listen on BBC Sounds.

BBC Sounds, Music, Radio, Podcasts.

Thanks for downloading this episode of In Our Time.

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I hope you enjoyed the programs.

Hello, on the 1st of November, 1755, a massive earthquake and tsunami devastated Lisbon

and its people, making it one of the deadliest in history.

The disaster inspired a new science of seismology, the study of earthquakes, which intensified

after San Francisco in 1906 and later with the need to monitor nuclear tests.

And as a consequence, we now know so much more about what lies beneath the surface of

the earth, how that moves and cracks and snaps, though it remains impossible to predict

when earthquakes will happen.

When we need to discuss seismology, I'm Rebecca Bell, lecturer in geology and geophysics

at Imperial College London, Zoe Mulden, lecturer in earth sciences and future leaders fellow

at the University of Plymouth, and James Hammond, reader in geophysics at Birkbeck University

...