ऑस्ट्रिया और प्रशा के मध्य 23 अगस्त 1866 ई. को कौन-सी संधि हुई थी?
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Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws.
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