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Douglas Russell is curator of the egg collection,

and he's been looking into the extraordinary story of Wilson, Bowers and Cherry-Garrard.

These are the three eggs we collected.

The three explorers set out with a 140-mile journey ahead of them to find the penguin eggs,

pulling their sleds through frozen darkness every step of the way.

One of the difficulties was that they couldn't pull the two nine-foot sledges

with all the weight that they had of provisions,

because the temperature so low that the ice crystals don't melt underneath the runners,

so it's not very easy.

You might think that it's actually dead easy to pull a sledge with some heavy weight on it.

It's not, as I'm sure you know.

Yeah, we know, we found this, it was like dragging a sledge across sand,

whereas the colder it gets, the harder it is to do.

They just had to keep going.