Fighting nature

Yesterday I was watching a programe on Discovery about defence related technologies which have derived their concepts from those occuring in nature, These included wierd stuff such as making bullet-proof aromour for soldiers from spider webs by genetically crossing the spider and the common goat to to produce milk which will have a residue similar to the spider web which is then spun under ideal humidity and light conditions to get the threads required. The programme also included other seemingly futuristic concepts for defence and the programme ended by concluding that for every offense stratergy thought of there will always be a defense stratergy already present in nature.
This made me think : Offense and defence occur in nature itself, we adapt these concepts from nature and use technology to make them happen. So it can lead to one conlusion, which is that "Fight! It's natural!"