Rare example of co-operative behaviour in Nature

Soldiers on sentry duty in hostile territory keep in regular radio contact with their colleagues to assure them that all is well and that they are safe to carry on their manoeuvres.

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<p><a href="http://www.physorg.com/news127656446.html">Rare example of co-operative behaviour in Nature</a></p> <p>Soldiers on sentry duty in hostile territory keep in regular radio contact with their colleagues to assure them that all is well and that they are safe to carry on their manoeuvres. </p>