The Dawn Chorus: why do birds do it? Also the sport of Tower Running: Athlete Mark Bourne has just made it up 91 floors in just over 11 minutes.



Presenter Julian Worricker with guests Erica Wagner and Colleen Graffy.

The Dawn Chorus: why do birds do it? Also the sport of Tower Running: Athlete Mark Bourne has just made it up 91 floors in just over 11 minutes. Presenter Julian Worricker with guests Erica Wagner and Colleen Graffy.

Singing at Dawn and Running up Towers

<p>Weekend news show with two invited guests. Broadcast on Saturdays and Sundays on BBC World Service.</p>

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Weekend news show with two invited guests. Broadcast on Saturdays and Sundays on BBC World Service.

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Singing at Dawn and Running up Towers

Singing at Dawn and Running up Towers