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Welcome to the History Extra podcast, fascinating historical conversations from the makers of BBC History Magazine.

From the depths of the Ice Age to the 20th century, why and how have species gone extinct?

And have humans always been to blame? In conversation with James Osborne

for today's Everything You Wanted to Know episode, Dr Ross Barnett impacts how the causes of extinction

have shifted over time and how looking back at the history of these lost species might help

us tackle extinction in the future.

I think a good place to start and lay the foundations for this conversation,

because it's such a broad topic, is prehistoricly and historically speaking,

why do different species go extinct and how have the causes of extinction changed

through time?

It's a really interesting and quite deep question because for a lot of the cases we

don't really know it's hard to pinpoint just one cause.

So for instance, if we go far back in time, if we talk about things like dinosaurs or

things from the deep past, then we have a fairly good idea of what happened. So for the case of

the dinosaurs, we have the evidence of the Chixilube asteroid impact and the kind of massive

devastation at that brought. And that's an example of an

...