Faithful to Science

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Rats, peace and ingenuity

a moving story from Sub-Saharan Africa

This week I watched a lovely episode of the BBC documentary series, Ingenious Animals (Oxford Scientific Films), presented by Hugh Fearnley-Whittingstall. The episode was about examples of animal intelligence, and the most beautiful example concerned a great big rat.

The African giant pouched rat (Cricetomys gambianus) looks like a big rat, though it is not a ‘true’ rat; it belongs to a different family (Nesomyidae) from the ordinary house rat (Muridae). These giant pouched rats grow to three feet long (including the tail), or about the size of a household cat. They are forever sniffing, sniffing, sniffing with their nose that has fifty times as many scent receptors as our own.

Belgian rat enthusiast Bart Weetjens loved playing with his pet rats when he was a boy. As a student at university he realised that these creatures might have the right combination of light weight, sensitive nose and sufficient intelligence to be trained in a truly life-transforming skill: detecting buried land mines.

These hideous mines litter the countryside in various parts of the world that have suffered conflict in the last fifty years. They have maimed and killed villagers in Tanzania and Cambodia and many other countries long after warring factions have moved on. They can be cleared only by painstaking search operations which, when carried out using metal detectors, are slow and expensive.

Enter the Hero Rat.

The mine-detecting rats are trained from a young age to respond to the smell of TNT, the explosive most commonly used in land mines. The television programme showed them interacting with their handlers who treat them with the same kindness you would see for any household pet in a good home. The rats are not themselves in danger from the mines because their bodies are sufficiently light. Once trained, they pursue their mission in close company with a handler who guides a pet rat over a patch of ground in a systematic search, using a lead. The rats go sniff sniff sniff, sniff sniff sniff all the time as they experience their surroundings largely through smell and hearing. Their eyesight is not strong.

When the searching rat smells TNT, it lifts its nose in the air and begins to scratch the ground. The handler clicks a clicker to signal to the rat that he can come and get his reward: nuts or bananas or other treats.

Watching all this, I was profoundly moved and mesmerized by the beautiful partnership of human and humble creature, helping us undo the harm that others of our species had done.  It was a combination of science and compassion, sense of justice and friendship, and the result is tremendous. A rat with his handler can check, in 20 minutes, an area that would take days for a human with a metal detector. This is partly because the rat senses the TNT itself and will not be distracted by other buried metal objects.

These rats have now helped to check or clear large tracts of land and their success has been celebrated and is being exported around the world.

I don’t know what the religious sensibilities or convictions may be of the people involved in this operation. I imagine they include a range of views. But whatever they are, this is, to me, a wonderful example of what humanity in creative partnership with the natural world looks like. This is what we are meant to do with the natural world: understand, and give to creatures an enlarged role. Also, the difficult problems that we face are not insurmountable, and getting rid of landmines is what solidarity and a sense of sheer justice looks like in practice. The patient people who have trained and handled these rats are those to whom God may say, “for I was in danger of being maimed, and you protected me, and I was unable to work the land, and you made it safe for me … when you did it for the least of these, you did it to me.”





1 Comment

  1. Gotta watch this! Hope it is available somewhere online. Landmines are a huge problem but seldom capture our attention. I like the theme of partnership.

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