About half a million mice live in the London Underground.

About half a million mice live in the London Underground.

An estimated 500,000 tiny mice live in the network of tunnels on the London Underground. That’s more than the population of even London’s biggest borough, Barnet, where 392,000 people live. So really there are more Tube mice than people from any London borough, making them a pretty strong group if they learned to get representation.

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