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Nanotechnology has been successfully used to target and destroy cancerous cells, according to BBC Online. A nanomachine targets a cancerous cell by detecting a vitamin called folate, which coats cancerous cells. The nanomachine then inserts a carbon nanotubule into the offending cell. When the tissue is subjected to near-infra red light, the nanotubules become hot and destroy the cancerous cells. Non-cancerous cells are unharmed.

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