LONDON (Reuters) – Scientists have come a step closer to creating a minuscule DNA computer that may one day be able to spot diseases like cancer from inside the body and release a drug to treat it. Professor Ehud Shapiro and researchers at Israel’s Weizmann Institute constructed the world’s smallest biomolecular computer a few years ago. Now they have programmed it to analyse biological information to detect and treat prostate cancer and a form of lung cancer in laboratory experiments. Could nanomachines be tomorrow’s doctors?.