I'm Rory Stewart and I grew up wanting to be a hero and I'm still fascinated by the ideas of heroism.

In my new series, I'm taking in the long sweep of history from Achilles to Zelensky and asking, what is a hero?

Simply doing your job, being a decent human being.

A true hero is someone who just kind of shines by their own light,

and that light is to be recognised by others.

The Long History of Heroism with me, Rory Stewart.

Listen on BBC Sounds.

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For details of our complete range of podcasts and our terms of use,

go to BBCworldservis.com slash podcasts.

A 40,000-year-old flute provides the earliest archaeological evidence of music making.

It's made from a vulture's wingbone, hollow and drilled with finger holes.

In this discovery programme on the BBC, I'll be exploring wind instruments.

Clownettes, bassoons and tin whistles have much in common,

but scientifically what gives each of them their distinctive sound character.

Recently, world musical instruments such as the didgeridoo have been attracting attention from scientists.

The way they are made is also their Achilles Hill, as ancient instruments have literally been eaten up.

Are you now warmed up?

Oh yeah, that was warming up, just remembering where the notes are.

Joe Wolfe is from the School of Physics in the University of New South Wales in Australia.

It looks like the trunk or sometimes the branch of a small eucalypt tree,

and the interior is eaten away by termites to make a hollow pipe.

...